SEC Filing | Cabot Corporation

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SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
SCHEDULE 13D

Under the Securities Exchange Act of 1934
(Amendment No. 11)*

CABOT CORPORATION
(Name of Issuer)

COMMON STOCK, PAR VALUE $1.00 PER SHARE
(Title of Class of Securities)

127055101
(CUSIP Number)

SPO Advisory Corp.
591 Redwood Highway, Suite 3215
Mill Valley, California 94941
(415) 383-6600

with a copy to:

Alison S. Ressler
Sullivan & Cromwell LLP
1888 Century Park East
Los Angeles, California 90067-1725
(310) 712-6600

(Name, Address and Telephone Number of Person Authorized to
Receive Notices and Communications)

August 3, 2009
(Date of Event which Requires Filing of This Statement)

If the filing person has previously filed a statement on Schedule 13G to report
the acquisition that is the subject of this Schedule 13D, and is filing this
Schedule because of Rule 13d-1(e), 13d-1(f) or 13d-1(g), check the following
box [_].

Note. Schedules filed in paper format shall include a signed original and five
copies of the schedule, including all exhibits. See Rule 13d-7 for other parties
to whom copies are to be sent.

*The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities, and
for any subsequent amendment containing information which would alter
disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed
to be "filed" for the purpose of Section 18 of the Securities Exchange Act of
1934 ("Act") or otherwise subject to the liabilities of that section of the Act
but shall be subject to all other provisions of the Act (however, see the
Notes).

Page 2 of 37 pages
CUSIP No. 127055101

- --------------------------------------------------------------------------------
1. NAME OF REPORTING PERSON
SPO Partners II, L.P.
- --------------------------------------------------------------------------------
2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP: (a) [_]
(b) [X]
- --------------------------------------------------------------------------------
3. SEC Use Only
- --------------------------------------------------------------------------------
4. SOURCE OF FUNDS
WC
- --------------------------------------------------------------------------------
5. CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
ITEMS 2(d) OR 2(e) [_]
- --------------------------------------------------------------------------------
6. CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware
- --------------------------------------------------------------------------------
7. SOLE VOTING POWER
4,419,200 (1)
------------------------------------------------------
Number Of Shares 8. SHARED VOTING POWER
Beneficially Owned By -0-
Each Reporting Person ------------------------------------------------------
With 9. SOLE DISPOSITIVE POWER
4,419,200 (1)
------------------------------------------------------
10. SHARED DISPOSITIVE POWER
-0-
- --------------------------------------------------------------------------------
11. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
4,419,200
- --------------------------------------------------------------------------------
12. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN
SHARES [_]
- --------------------------------------------------------------------------------
13. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
6.8%
- --------------------------------------------------------------------------------
14. TYPE OF REPORTING PERSON
PN
- --------------------------------------------------------------------------------

(1) Power is exercised through its sole general partner, SPO Advisory Partners,
L.P.

Page 3 of 37 pages
CUSIP No. 127055101

- --------------------------------------------------------------------------------
1. NAME OF REPORTING PERSON
SPO Advisory Partners, L.P.
- --------------------------------------------------------------------------------
2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP: (a) [_]
(b) [X]
- --------------------------------------------------------------------------------
3. SEC Use Only
- --------------------------------------------------------------------------------
4. SOURCE OF FUNDS
Not Applicable
- --------------------------------------------------------------------------------
5. CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
ITEMS 2(d) OR 2(e) [_]
- --------------------------------------------------------------------------------
6. CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware
- --------------------------------------------------------------------------------
7. SOLE VOTING POWER
4,419,200 (1)(2)
------------------------------------------------------
Number Of Shares 8. SHARED VOTING POWER
Beneficially Owned By -0-
Each Reporting Person ------------------------------------------------------
With 9. SOLE DISPOSITIVE POWER
4,419,200 (1)(2)
------------------------------------------------------
10. SHARED DISPOSITIVE POWER
-0-
- --------------------------------------------------------------------------------
11. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
4,419,200
- --------------------------------------------------------------------------------
12. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN
SHARES [_]
- --------------------------------------------------------------------------------
13. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
6.8%
- --------------------------------------------------------------------------------
14. TYPE OF REPORTING PERSON
PN
- --------------------------------------------------------------------------------

(1) Solely in its capacity as the sole general partner of SPO Partners II, L.P.
(2) Power is exercised through its sole general partner, SPO Advisory Corp.

Page 4 of 37 pages
CUSIP No. 127055101

- --------------------------------------------------------------------------------
1. NAME OF REPORTING PERSON
SPO Advisory Corp.
- --------------------------------------------------------------------------------
2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP: (a) [_]
(b) [X]
- --------------------------------------------------------------------------------
3. SEC Use Only
- --------------------------------------------------------------------------------
4. SOURCE OF FUNDS
Not Applicable
- --------------------------------------------------------------------------------
5. CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
ITEMS 2(d) OR 2(e) [_]
- --------------------------------------------------------------------------------
6. CITIZENSHIP OR PLACE OF ORGANIZATION
Delaware
- --------------------------------------------------------------------------------
7. SOLE VOTING POWER
4,419,200 (1)(2)
------------------------------------------------------
Number Of Shares 8. SHARED VOTING POWER
Beneficially Owned By -0-
Each Reporting Person ------------------------------------------------------
With 9. SOLE DISPOSITIVE POWER
4,419,200 (1)(2)
------------------------------------------------------
10. SHARED DISPOSITIVE POWER
-0-
- --------------------------------------------------------------------------------
11. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
4,419,200
- --------------------------------------------------------------------------------
12. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN
SHARES [_]
- --------------------------------------------------------------------------------
13. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
6.8%
- --------------------------------------------------------------------------------
14. TYPE OF REPORTING PERSON
CO
- --------------------------------------------------------------------------------

(1) Solely in its capacity as the sole general partner of SPO Advisory
Partners, L.P. with respect to 4,419,200 of such shares.

(2) Power is exercised through its four controlling persons, John H. Scully,
William E. Oberndorf, William J. Patterson and Edward H. McDermott.

Page 5 of 37 pages
CUSIP No. 127055101

- --------------------------------------------------------------------------------
1. NAME OF REPORTING PERSON
John H. Scully
- --------------------------------------------------------------------------------
2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP: (a) [_]
(b) [X]
- --------------------------------------------------------------------------------
3. SEC Use Only
- --------------------------------------------------------------------------------
4. SOURCE OF FUNDS
Not Applicable
- --------------------------------------------------------------------------------
5. CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
ITEMS 2(d) OR 2(e) [_]
- --------------------------------------------------------------------------------
6. CITIZENSHIP OR PLACE OF ORGANIZATION
USA
- --------------------------------------------------------------------------------
7. SOLE VOTING POWER
-0-
------------------------------------------------------
Number Of Shares 8. SHARED VOTING POWER
Beneficially Owned By 4,419,200 (1)
Each Reporting Person ------------------------------------------------------
With 9. SOLE DISPOSITIVE POWER
-0-
------------------------------------------------------
10. SHARED DISPOSITIVE POWER
4,419,200 (1)
- --------------------------------------------------------------------------------
11. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
4,419,200
- --------------------------------------------------------------------------------
12. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN
SHARES [_]
- --------------------------------------------------------------------------------
13. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
6.8%
- --------------------------------------------------------------------------------
14. TYPE OF REPORTING PERSON
IN
- --------------------------------------------------------------------------------

(1) These shares may be deemed to be beneficially owned by Mr. Scully solely
in his capacity as one of four controlling persons of SPO Advisory Corp.

Page 6 of 37 pages
CUSIP No. 127055101

- --------------------------------------------------------------------------------
1. NAME OF REPORTING PERSON
William E. Oberndorf
- --------------------------------------------------------------------------------
2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP: (a) [_]
(b) [X]
- --------------------------------------------------------------------------------
3. SEC Use Only
- --------------------------------------------------------------------------------
4. SOURCE OF FUNDS
Not Applicable and PF
- --------------------------------------------------------------------------------
5. CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
ITEMS 2(d) OR 2(e) [_]
- --------------------------------------------------------------------------------
6. CITIZENSHIP OR PLACE OF ORGANIZATION
USA
- --------------------------------------------------------------------------------
7. SOLE VOTING POWER
159,900 (1)
------------------------------------------------------
Number Of Shares 8. SHARED VOTING POWER
Beneficially Owned By 4,752,850 (2)
Each Reporting Person ------------------------------------------------------
With 9. SOLE DISPOSITIVE POWER
159,900 (1)
------------------------------------------------------
10. SHARED DISPOSITIVE POWER
4,752,850 (2)
- --------------------------------------------------------------------------------
11. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
4,912,750
- --------------------------------------------------------------------------------
12. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN
SHARES [_]
- --------------------------------------------------------------------------------
13. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
7.5%
- --------------------------------------------------------------------------------
14. TYPE OF REPORTING PERSON
IN
- --------------------------------------------------------------------------------

(1) Of these shares, 49,900 shares are held in William E. Oberndorf's
Individual Retirement Account, which is self-directed, 100,000 shares may be
deemed to be beneficially owned by Mr. Oberndorf solely in his capacity as sole
general partner of Oberndorf Family Partners, a family partnership, and 10,000
shares are owned by Mr. Oberndorf solely in his capacity as trustee for the
account of his children.

(2) Of these shares, 4,419,200 shares may be deemed to be beneficially owned by
Mr. Oberndorf solely in his capacity as one of the four controlling persons of
SPO Advisory Corp., and 333,650 shares may be deemed to be beneficially owned by
Mr. Oberndorf solely in his capacity as a trustee of the William and Susan
Oberndorf Trust, dated 10/19/98.

Page 7 of 37 pages
CUSIP No. 127055101

- --------------------------------------------------------------------------------
1. NAME OF REPORTING PERSON
William and Susan Oberndorf Trust, dated 10/19/98
- --------------------------------------------------------------------------------
2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP: (a) [_]
(b) [X]
- --------------------------------------------------------------------------------
3. SEC Use Only
- --------------------------------------------------------------------------------
4. SOURCE OF FUNDS
PF
- --------------------------------------------------------------------------------
5. CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
ITEM 2(d) OR 2(e) [_]
- --------------------------------------------------------------------------------
6. CITIZENSHIP OR PLACE OF ORGANIZATION
California
- --------------------------------------------------------------------------------
7. SOLE VOTING POWER
333,650 (1)
------------------------------------------------------
Number Of Shares 8. SHARED VOTING POWER
Beneficially Owned By -0-
Each Reporting Person ------------------------------------------------------
With 9. SOLE DISPOSITIVE POWER
333,650 (1)
------------------------------------------------------
10. SHARED DISPOSITIVE POWER
-0-
- --------------------------------------------------------------------------------
11. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
333,650 (1)
- --------------------------------------------------------------------------------
12. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN
SHARES [_]
- --------------------------------------------------------------------------------
13. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
0.5%
- --------------------------------------------------------------------------------
14. TYPE OF REPORTING PERSON
OO
- --------------------------------------------------------------------------------

(1) Power is exercised through its trustees, William E. Oberndorf and Susan C.
Oberndorf.

Page 8 of 37 pages
CUSIP No. 127055101

- --------------------------------------------------------------------------------
1. NAME OF REPORTING PERSON
Oberndorf Family Partners
- --------------------------------------------------------------------------------
2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP: (a) [_]
(b) [X]
- --------------------------------------------------------------------------------
3. SEC Use Only
- --------------------------------------------------------------------------------
4. SOURCE OF FUNDS
WC
- --------------------------------------------------------------------------------
5. CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
ITEMS 2(d) OR 2(e) [_]
- --------------------------------------------------------------------------------
6. CITIZENSHIP OR PLACE OF ORGANIZATION
California
- --------------------------------------------------------------------------------
7. SOLE VOTING POWER
100,000 (1)
------------------------------------------------------
Number Of Shares 8. SHARED VOTING POWER
Beneficially Owned By -0-
Each Reporting Person ------------------------------------------------------
With 9. SOLE DISPOSITIVE POWER
100,000 (1)
------------------------------------------------------
10. SHARED DISPOSITIVE POWER
-0-
- --------------------------------------------------------------------------------
11. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
100,000 (1)
- --------------------------------------------------------------------------------
12. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN
SHARES [_]
- --------------------------------------------------------------------------------
13. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
0.2%
- --------------------------------------------------------------------------------
14. TYPE OF REPORTING PERSON
PN
- --------------------------------------------------------------------------------

(1) Power is exercised through its sole general partner, William E. Oberndorf.

Page 9 of 37 pages
CUSIP No. 127055101

- --------------------------------------------------------------------------------
1. NAME OF REPORTING PERSON
William J. Patterson
- --------------------------------------------------------------------------------
2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP: (a) [_]
(b) [X]
- --------------------------------------------------------------------------------
3. SEC Use Only
- --------------------------------------------------------------------------------
4. SOURCE OF FUNDS
Not Applicable
- --------------------------------------------------------------------------------
5. CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
ITEMS 2(d) OR 2(e) [_]
- --------------------------------------------------------------------------------
6. CITIZENSHIP OR PLACE OF ORGANIZATION
USA
- --------------------------------------------------------------------------------
7. SOLE VOTING POWER
-0-
------------------------------------------------------
Number Of Shares 8. SHARED VOTING POWER
Beneficially Owned By 4,429,200 (1)
Each Reporting Person ------------------------------------------------------
With 9. SOLE DISPOSITIVE POWER
-0-
------------------------------------------------------
10. SHARED DISPOSITIVE POWER
4,429,200 (1)
- --------------------------------------------------------------------------------
11. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
4,429,200
- --------------------------------------------------------------------------------
12. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN
SHARES [_]
- --------------------------------------------------------------------------------
13. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
6.8%
- --------------------------------------------------------------------------------
14. TYPE OF REPORTING PERSON
IN
- --------------------------------------------------------------------------------

(1) Of these shares, 4,419,200 shares may be deemed to be beneficially owned by
Mr. Patterson solely in his capacity as one of the four controlling persons of
SPO Advisory Corp. and 10,000 shares may be deemed to be beneficially owned by
Mr. Patterson solely in his capacity as a controlling person, director and
executive officer of the Elizabeth R. & William J. Patterson Foundation.

Page 10 of 37 pages
CUSIP No. 127055101

- --------------------------------------------------------------------------------
1. NAME OF REPORTING PERSON
The Elizabeth R. & William J. Patterson Foundation
- --------------------------------------------------------------------------------
2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP: (a) [_]
(b) [X]
- --------------------------------------------------------------------------------
3. SEC Use Only
- --------------------------------------------------------------------------------
4. SOURCE OF FUNDS
WC
- --------------------------------------------------------------------------------
5. CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
ITEMS 2(d) OR 2(e) [_]
- --------------------------------------------------------------------------------
6. CITIZENSHIP OR PLACE OF ORGANIZATION
CALIFORNIA
- --------------------------------------------------------------------------------
7. SOLE VOTING POWER
10,000 (1)
------------------------------------------------------
Number Of Shares 8. SHARED VOTING POWER
Beneficially Owned By -0-
Each Reporting Person ------------------------------------------------------
With 9. SOLE DISPOSITIVE POWER
10,000 (1)
------------------------------------------------------
10. SHARED DISPOSITIVE POWER
-0-
- --------------------------------------------------------------------------------
11. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
10,000
- --------------------------------------------------------------------------------
12. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN
SHARES [_]
- --------------------------------------------------------------------------------
13. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
**0.1%
- --------------------------------------------------------------------------------
14. TYPE OF REPORTING PERSON
CO
- --------------------------------------------------------------------------------

** Denotes less than.

(1) Power is exercised through its controlling persons, directors and executive
officers, William J. Patterson and Elizabeth R. Patterson.

Page 11 of 37 pages
CUSIP No. 127055101

- --------------------------------------------------------------------------------
1. NAME OF REPORTING PERSON
Edward H. McDermot
- --------------------------------------------------------------------------------
2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP: (a) [_]
(b) [X]
- --------------------------------------------------------------------------------
3. SEC Use Only
- --------------------------------------------------------------------------------
4. SOURCE OF FUNDS
Not Applicable
- --------------------------------------------------------------------------------
5. CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
ITEMS 2(d) OR 2(e) [_]
- --------------------------------------------------------------------------------
6. CITIZENSHIP OR PLACE OF ORGANIZATION
USA
- --------------------------------------------------------------------------------
7. SOLE VOTING POWER
-0-
------------------------------------------------------
Number Of Shares 8. SHARED VOTING POWER
Beneficially Owned By 4,419,200 (1)
Each Reporting Person ------------------------------------------------------
With 9. SOLE DISPOSITIVE POWER
-0-
------------------------------------------------------
10. SHARED DISPOSITIVE POWER
4,419,200 (1)
- --------------------------------------------------------------------------------
11. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
4,419,200
- --------------------------------------------------------------------------------
12. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN
SHARES [_]
- --------------------------------------------------------------------------------
13. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
6.8%
- --------------------------------------------------------------------------------
14. TYPE OF REPORTING PERSON
IN
- --------------------------------------------------------------------------------

(1) These shares may be deemed to be beneficially owned by Mr. McDermott solely
in his capacity as one of four controlling persons of SPO Advisory Corp.

Page 12 of 37 pages
CUSIP No. 127055101

- --------------------------------------------------------------------------------
1. NAME OF REPORTING PERSON
Ian R. McGuire
- --------------------------------------------------------------------------------
2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP: (a) [_]
(b) [X]
- --------------------------------------------------------------------------------
3. SEC Use Only
- --------------------------------------------------------------------------------
4. SOURCE OF FUNDS
PF
- --------------------------------------------------------------------------------
5. CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
ITEMS 2(d) OR 2(e) [_]
- --------------------------------------------------------------------------------
6. CITIZENSHIP OR PLACE OF ORGANIZATION
CALIFORNIA
- --------------------------------------------------------------------------------
7. SOLE VOTING POWER
475
------------------------------------------------------
Number Of Shares 8. SHARED VOTING POWER
Beneficially Owned By -0-
Each Reporting Person ------------------------------------------------------
With 9. SOLE DISPOSITIVE POWER
475
------------------------------------------------------
10. SHARED DISPOSITIVE POWER
-0-
- --------------------------------------------------------------------------------
11. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
475
- --------------------------------------------------------------------------------
12. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN
SHARES [_]
- --------------------------------------------------------------------------------
13. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
**0.1%
- --------------------------------------------------------------------------------
14. TYPE OF REPORTING PERSON
IN
- --------------------------------------------------------------------------------

** Denotes less than.

Page 13 of 37 pages
CUSIP No. 127055101

- --------------------------------------------------------------------------------
1. NAME OF REPORTING PERSON
Betty Jane Weimer
- --------------------------------------------------------------------------------
2. CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP: (a) [_]
(b) [X]
- --------------------------------------------------------------------------------
3. SEC Use Only
- --------------------------------------------------------------------------------
4. SOURCE OF FUNDS
PF
- --------------------------------------------------------------------------------
5. CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO
ITEMS 2(d) OR 2(e) [_]
- --------------------------------------------------------------------------------
6. CITIZENSHIP OR PLACE OF ORGANIZATION
California
- --------------------------------------------------------------------------------
7. SOLE VOTING POWER
5,000
------------------------------------------------------
Number Of Shares 8. SHARED VOTING POWER
Beneficially Owned By -0-
Each Reporting Person ------------------------------------------------------
With 9. SOLE DISPOSITIVE POWER
5,000
------------------------------------------------------
10. SHARED DISPOSITIVE POWER
-0-
- --------------------------------------------------------------------------------
11. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
5,000
- --------------------------------------------------------------------------------
12. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN
SHARES [_]
- --------------------------------------------------------------------------------
13. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
**0.1%
- --------------------------------------------------------------------------------
14. TYPE OF REPORTING PERSON
IN
- --------------------------------------------------------------------------------

** Denotes less than.

Page 14 of 37 pages

This Amendment No. 11 amends the Schedule 13D (the "Original 13D")
filed with the Securities and Exchange Commission ("SEC") on August 29, 2005 and
as amended on September 14, 2005, September 26, 2005, October 20, 2005, November
8, 2005, January 12, 2006, June 20, 2006, December 18, 2007, January 4, 2008,
August 12, 2008 and June 1, 2009. Unless otherwise stated herein, the Original
13D, as previously amended, remains in full force and effect. Terms used herein
and not defined herein shall have the meanings ascribed thereto in the Original
13D.

ITEM 2. IDENTITY AND BACKGROUND.

Item 2(a) is hereby amended and restated in its entirety as follows:

(a) The undersigned hereby file this Schedule 13D Statement on behalf
of SPO Partners II, L.P., a Delaware limited partnership ("SPO"), SPO Advisory
Partners, L.P., a Delaware limited partnership ("SPO Advisory Partners"), SPO
Advisory Corp., a Delaware corporation ("SPO Advisory Corp."), John H. Scully
("JHS"), William E. Oberndorf ("WEO"), William J. Patterson ("WJP"), Edward H.
McDermott ("EHM"), the William and Susan Oberndorf Trust, dated 10/19/98
("Oberndorf Trust"), Oberndorf Family Partners, a California limited partnership
("OFP"), the Elizabeth R. & William J. Patterson Foundation, a California
corporation ("Patterson Foundation"), Ian R. McGuire ("IRM") and Betty Jane
Weimer ("BJW"). SPO, SPO Advisory Partners, SPO Advisory Corp., JHS, WEO, WJP,
EHM, the Oberndorf Trust, OFP, Patterson Foundation, IRM and BJW are sometimes
hereinafter referred to as the "Reporting Persons." The Reporting Persons are
making this single, joint filing because they may be deemed to constitute a
"group" within the meaning of Section 13(d)(3) of the Securities Exchange Act of
1934, as amended (the "Act"), although neither the fact of this filing nor
anything contained herein shall be deemed to be an admission by the Reporting
Persons that a group exists.

Page 15 of 37 pages

ITEM 3. SOURCE AND AMOUNT OF FUNDS OR OTHER CONSIDERATION.

Item 3 is hereby amended and restated in its entirety as follows:

The source and amount of the funds used or to be used by the Reporting
Persons to purchase Shares are as follows:

NAME SOURCE OF FUNDS AMOUNT OF FUNDS
- --------------------- --------------------------- ---------------
SPO Contributions from Partners $225,835,940
SPO Advisory Partners Not Applicable Not Applicable
SPO Advisory Corp. Not Applicable Not Applicable
JHS Not Applicable Not Applicable
WEO Not Applicable and
Personal Funds (1) $ 4,414,285
WJP Not Applicable Not Applicable
EHM Not Applicable Not Applicable
Oberndorf Trust Personal Funds (1) $ 12,237,424
OFP Contribution from Partners $ 3,635,448
Patterson Foundation Contributions from Shareholders $ 521,488
IRM Personal Funds (1) $16,877
BJW Personal Funds (1) $ 186,594

- ----------
(1) As used herein, the term "Personal Funds" includes sums borrowed from banks
and brokerage firm margin accounts, none of which were borrowed or otherwise
obtained for the specified purpose of acquiring, holding, trading or voting
Shares.

ITEM 5. INTEREST IN SECURITIES OF THE ISSUER.

Item 5 is hereby amended and restated in its entirety as follows:

(a) Percentage interest calculations for each Reporting Person are
based upon the Issuer having 65,401,025 total outstanding shares of Common Stock
as reported on the Issuer's 10-Q filed with the Securities and Exchange
Commission on May 11, 2009.

SPO

The aggregate number of Shares that SPO owns beneficially, pursuant to
Rule 13d-3 of the Act, is 4,419,200 Shares, which constitutes approximately 6.8%
of the outstanding Shares.

SPO Advisory Partners

Because of its position as the sole general partner of SPO, SPO
Advisory Partners may, pursuant to Rule 13d-3 of the Act, be deemed to be the
beneficial owner of 4,419,200 Shares, which constitutes approximately 6.8% of
the outstanding Shares.

SPO Advisory Corp.

Because of its position as the sole general partner of SPO Advisory
Partners, SPO Advisory Corp. may, pursuant to Rule 13d-3 of the Act, be deemed
to be the beneficial owner of 4,419,200 Shares in the aggregate, which
constitutes approximately 6.8% of the outstanding Shares.

JHS

Because of his position as a control person of SPO Advisory Corp., JHS
may, pursuant to Rule 13d-3 of the Act, be deemed to be the beneficial owner of
4,419,200 Shares, which constitutes approximately 6.8% of the outstanding
Shares.

WEO

Individually, and because of his positions as a control person of SPO
Advisory Corp., a trustee of the Oberndorf Trust and sole general partner of OFP
and as trustee for the account of his children, WEO may, pursuant to Rule 13d-3
of the Act, be deemed to be the beneficial owner of 4,912,750 Shares in the
aggregate, which constitutes approximately 7.5% of the outstanding Shares.

Page 16 of 37 pages

WJP

Because of his position as a control person of SPO Advisory Corp. and
as a control person, director and executive officer of Patterson Foundation, WJP
may, pursuant to Rule 13d-3 of the Act, be deemed to be the beneficial owner of
4,429,200 Shares, which constitutes approximately 6.8% of the outstanding
Shares.

EHM

Because of his position as a control person of SPO Advisory Corp., EHM
may, pursuant to Rule 13d-3 of the Act, be deemed to be the beneficial owner of
4,419,200 Shares, which constitutes approximately 6.8% of the outstanding
Shares.

Oberndorf Trust

The aggregate number of Shares that the Oberndorf Trust owns
beneficially, pursuant to Rule 13d-3 of the Act, is 333,650 Shares, which
constitutes approximately 0.5% of the outstanding Shares.

OFP

The aggregate number of Shares that OFP owns beneficially, pursuant to
Rule 13d-3 of the Act, is 100,000 Shares, which constitutes approximately 0.2%
of the outstanding Shares.

Patterson Foundation

The aggregate number of Shares that Patterson Foundation owns
beneficially, pursuant to Rule 13d-3 of the Act, is 10,000, which constitutes
less than 0.1% of the outstanding Shares.

IRM

The aggregate number of Shares that IRM owns beneficially, pursuant to
Rule 13d-3 of the Act, is 475 Shares, which constitutes less than 0.1% of the
outstanding Shares.

BJW

The aggregate number of Shares that BJW owns beneficially, pursuant to
Rule 13d-3 of the Act, is 5,000 Shares, which constitutes less than 0.1% of the
outstanding Shares.

To the best of the knowledge of each of the Reporting Persons, other
than as set forth above, none of the persons named in Item 2 hereof is the
beneficial owner of any Shares.

(b) SPO

Acting through its sole general partner, SPO has the sole power to vote
or to direct the vote and to dispose or to direct the disposition of 4,419,200
Shares.

SPO Advisory Partners

Acting through its sole general partner and in its capacity as the sole
general partner of SPO, SPO Advisory Partners has the sole power to vote or to
direct the vote and to dispose or to direct the disposition of 4,419,200 Shares.

Page 17 of 37 pages

SPO Advisory Corp.

Acting through its controlling persons and in its capacity as the sole
general partner of SPO Advisory Partners, SPO Advisory Corp. has the sole power
to vote or to direct the vote and to dispose or to direct the disposition of
4,419,200 Shares in the aggregate.

JHS

As one of four controlling persons of SPO Advisory Corp., which is the
sole general partner of SPO Advisory Partners, JHS may be deemed to have shared
power with WEO, WJP and EHM to vote or to direct the vote and to dispose or to
direct the disposition of 4,419,200 Shares held by SPO.

WEO

As one of four controlling persons of SPO Advisory Corp., which is the
sole general partner of SPO Advisory Partners, WEO may be deemed to have shared
power with JHS, WJP and EHM to vote or to direct the vote and to dispose or to
direct the disposition of 4,419,200 Shares held by SPO. WEO may be deemed to
have shared power to vote or to direct the vote and to dispose or to direct the
disposition of 333,650 Shares held in the Oberndorf Trust. Individually, and
because of his position as the sole general partner of OFP, WEO has the sole
power to vote or to direct the vote and to dispose or to direct the disposition
of 49,900 Shares held in WEO's Individual Retirement Account, which is self
directed, and 100,000 Shares held by OFP. Solely in his capacity as trustee for
the account of his children, WEO has the sole power to vote or to direct the
vote and to dispose or to direct the disposition of 10,000 shares owned by his
children.

WJP

As one of four controlling persons of SPO Advisory Corp., which is the
sole general partner of SPO Advisory Partners, WJP may be deemed to have shared
power with JHS, WEO and EHM to vote or to direct the vote and to dispose or to
direct the disposition of 4,419,200 Shares held by SPO. WJP may be deemed to
have shared power to vote or to direct the vote and to dispose or to direct the
disposition of 10,000 Shares held by the Patterson Foundation.

EHM

As one of four controlling persons of SPO Advisory Corp., which is the
sole general partner of SPO Advisory Partners, EHM may be deemed to have shared
power with JHS, WEO and WJP to vote or to direct the vote and to dispose or to
direct the disposition of 4,419,200 Shares held by SPO.

Page 18 of 37 pages

Oberndorf Trust

Acting through its trustees, Oberndorf Trust has the sole power to vote
or to direct the vote and to dispose or to direct the disposition of 333,650
Shares in the aggregate.

OFP

OFP has the sole power to vote or to direct the vote and to dispose or
to direct the disposition of 100,000 Shares.

Patterson Foundation

Acting through its two controlling persons, directors and executive
officers, Patterson Foundation has the sole power to vote or to direct the vote
and to dispose or to direct the disposition of 10,000 Shares.

IRM

IRM has the sole power to vote or to direct the vote and to dispose or
to direct the disposition of 475 Shares.

BJW

BJW has the sole power to vote or to direct the vote and to dispose or
to direct the disposition of 5,000 Shares.

(c) During the past 60 days, the Reporting Persons sold Shares in open
market transactions as set forth on Schedule I attached hereto.

Except as set forth in this paragraph (c), to the best of the knowledge
of each of the Reporting Persons, none of the persons named in response to
paragraph (a) has effected any transactions in Shares during the past 60 days.

(d) Each of the Reporting Persons affirms that no person other than
such Reporting Person has the right to receive or the power to direct the
receipt of distributions with respect to, or the proceeds from the sale of,
Shares owned by such Reporting Person.

(e) Not applicable.

ITEM 7. MATERIAL TO BE FILED AS EXHIBITS.

Item 7 is hereby amended and restated in its entirety as follows:

Exhibit A: Agreement pursuant to Rule 13d-1(k)

Page 19 of 37 pages

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify
that the information set forth in this statement is true, complete and correct.

Dated August 5, 2009 By: /s/ Kim M. Silva
--------------------------------
Kim M. Silva

Attorney-in-Fact for:

SPO PARTNERS II, L.P.(1)
SPO ADVISORY PARTNERS, L.P.(1)
SPO ADVISORY CORP.(1)
JOHN H. SCULLY(1)
WILLIAM E. OBERNDORF(1)
WILLIAM J. PATTERSON(1)
EDWARD H. MCDERMOTT(1)
WILLIAM AND SUSAN OBERNDORF TRUST,
DATED 10/19/98 (1)
OBERNDORF FAMILY PARTNERS (1)
THE ELIZABETH R. & WILLIAM J.
PATTERSON FOUNDATION (1)
IAN R. MCGUIRE (1)
BETTY JANE WEIMER (1)

(1) A Power of Attorney
authorizing Kim M. Silva to
act on behalf of this
person or entity has been previously
filed with the Securities and
Exchange Commission.

Page 20 of 37 pages

SCHEDULE I TO SCHEDULE 13D

NUMBER
DATE OF OF PRICE PER WHERE/HOW TRANSACTION
REPORTING PERSON TRANSACTION TYPE SHARES SHARE ($) EFFECTED
- ----------------------------------------- ----------- ---- ------ --------- ---------------------

SPO Partners II, L.P. 07/24/09 Sell 134,157 16.00 Open Market/Broker
SPO Partners II, L.P. 07/24/09 Sell 17,410 16.01 Open Market/Broker
SPO Partners II, L.P. 07/24/09 Sell 12,391 16.02 Open Market/Broker
SPO Partners II, L.P. 07/24/09 Sell 9,086 16.03 Open Market/Broker
SPO Partners II, L.P. 07/24/09 Sell 702 16.04 Open Market/Broker
SPO Partners II, L.P. 07/24/09 Sell 1,480 16.15 Open Market/Broker
SPO Partners II, L.P. 07/24/09 Sell 1,184 16.16 Open Market/Broker
SPO Partners II, L.P. 07/24/09 Sell 787 16.17 Open Market/Broker
SPO Partners II, L.P. 07/24/09 Sell 3 16.18 Open Market/Broker
The Elizabeth R. and William J. Patterson 07/24/09 Sell 303 16.00 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/24/09 Sell 39 16.01 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/24/09 Sell 28 16.02 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/24/09 Sell 21 16.03 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/24/09 Sell 2 16.04 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/24/09 Sell 3 16.15 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/24/09 Sell 3 16.16 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/24/09 Sell 1 16.17 Open Market/Broker
Foundation
William E. Oberndorf IRA 07/24/09 Sell 1,514 16.00 Open Market/Broker
William E. Oberndorf IRA 07/24/09 Sell 196 16.01 Open Market/Broker
William E. Oberndorf IRA 07/24/09 Sell 140 16.02 Open Market/Broker
William E. Oberndorf IRA 07/24/09 Sell 103 16.03 Open Market/Broker
William E. Oberndorf IRA 07/24/09 Sell 8 16.04 Open Market/Broker
William E. Oberndorf IRA 07/24/09 Sell 17 16.15 Open Market/Broker
William E. Oberndorf IRA 07/24/09 Sell 13 16.16 Open Market/Broker
William E. Oberndorf IRA 07/24/09 Sell 9 16.17 Open Market/Broker
SPO Partners II, L.P. 07/27/09 Sell 89,931 16.00 Open Market/Broker
SPO Partners II, L.P. 07/27/09 Sell 987 16.01 Open Market/Broker
SPO Partners II, L.P. 07/27/09 Sell 1,440 16.02 Open Market/Broker
SPO Partners II, L.P. 07/27/09 Sell 1,184 16.03 Open Market/Broker
SPO Partners II, L.P. 07/27/09 Sell 3,454 16.04 Open Market/Broker
SPO Partners II, L.P. 07/27/09 Sell 494 16.05 Open Market/Broker
SPO Partners II, L.P. 07/27/09 Sell 198 16.06 Open Market/Broker
SPO Partners II, L.P. 07/27/09 Sell 296 16.07 Open Market/Broker
SPO Partners II, L.P. 07/27/09 Sell 198 16.08 Open Market/Broker
SPO Partners II, L.P. 07/27/09 Sell 198 16.09 Open Market/Broker
SPO Partners II, L.P. 07/27/09 Sell 25,853 16.10 Open Market/Broker
SPO Partners II, L.P. 07/27/09 Sell 4,638 16.11 Open Market/Broker
SPO Partners II, L.P. 07/27/09 Sell 4,539 16.12 Open Market/Broker
SPO Partners II, L.P. 07/27/09 Sell 5,921 16.13 Open Market/Broker
SPO Partners II, L.P. 07/27/09 Sell 4,243 16.14 Open Market/Broker

Page 21 of 37 pages

SCHEDULE I TO SCHEDULE 13D

SPO Partners II, L.P. 07/27/09 Sell 4,243 16.15 Open Market/Broker
SPO Partners II, L.P. 07/27/09 Sell 2,171 16.16 Open Market/Broker
SPO Partners II, L.P. 07/27/09 Sell 2,664 16.17 Open Market/Broker
SPO Partners II, L.P. 07/27/09 Sell 1,678 16.18 Open Market/Broker
SPO Partners II, L.P. 07/27/09 Sell 4,341 16.19 Open Market/Broker
SPO Partners II, L.P. 07/27/09 Sell 2,763 16.20 Open Market/Broker
SPO Partners II, L.P. 07/27/09 Sell 1,085 16.21 Open Market/Broker
SPO Partners II, L.P. 07/27/09 Sell 981 16.22 Open Market/Broker
SPO Partners II, L.P. 07/27/09 Sell 200 16.23 Open Market/Broker
The Elizabeth R. and William J. Patterson 07/27/09 Sell 220 16.00 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/27/09 Sell 2 16.01 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/27/09 Sell 4 16.02 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/27/09 Sell 3 16.03 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/27/09 Sell 8 16.04 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/27/09 Sell 1 16.05 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/27/09 Sell 1 16.07 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/27/09 Sell 63 16.10 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/27/09 Sell 11 16.11 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/27/09 Sell 11 16.12 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/27/09 Sell 14 16.13 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/27/09 Sell 10 16.14 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/27/09 Sell 10 16.15 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/27/09 Sell 5 16.16 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/27/09 Sell 7 16.17 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/27/09 Sell 4 16.18 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/27/09 Sell 11 16.19 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/27/09 Sell 7 16.20 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/27/09 Sell 3 16.21 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/27/09 Sell 5 16.22 Open Market/Broker
Foundation
William E. Oberndorf IRA 07/27/09 Sell 989 16.00 Open Market/Broker
William E. Oberndorf IRA 07/27/09 Sell 11 16.01 Open Market/Broker
William E. Oberndorf IRA 07/27/09 Sell 16 16.02 Open Market/Broker
William E. Oberndorf IRA 07/27/09 Sell 13 16.03 Open Market/Broker
William E. Oberndorf IRA 07/27/09 Sell 38 16.04 Open Market/Broker
William E. Oberndorf IRA 07/27/09 Sell 5 16.05 Open Market/Broker
William E. Oberndorf IRA 07/27/09 Sell 2 16.06 Open Market/Broker
William E. Oberndorf IRA 07/27/09 Sell 3 16.07 Open Market/Broker
William E. Oberndorf IRA 07/27/09 Sell 2 16.08 Open Market/Broker
William E. Oberndorf IRA 07/27/09 Sell 2 16.09 Open Market/Broker
William E. Oberndorf IRA 07/27/09 Sell 284 16.10 Open Market/Broker

Page 22 of 37 pages

SCHEDULE I TO SCHEDULE 13D

William E. Oberndorf IRA 07/27/09 Sell 51 16.11 Open Market/Broker
William E. Oberndorf IRA 07/27/09 Sell 50 16.12 Open Market/Broker
William E. Oberndorf IRA 07/27/09 Sell 65 16.13 Open Market/Broker
William E. Oberndorf IRA 07/27/09 Sell 47 16.14 Open Market/Broker
William E. Oberndorf IRA 07/27/09 Sell 47 16.15 Open Market/Broker
William E. Oberndorf IRA 07/27/09 Sell 24 16.16 Open Market/Broker
William E. Oberndorf IRA 07/27/09 Sell 29 16.17 Open Market/Broker
William E. Oberndorf IRA 07/27/09 Sell 18 16.18 Open Market/Broker
William E. Oberndorf IRA 07/27/09 Sell 48 16.19 Open Market/Broker
William E. Oberndorf IRA 07/27/09 Sell 30 16.20 Open Market/Broker
William E. Oberndorf IRA 07/27/09 Sell 12 16.21 Open Market/Broker
William E. Oberndorf IRA 07/27/09 Sell 14 16.22 Open Market/Broker
SPO Partners II, L.P. 07/28/09 Sell 24,651 16.00 Open Market/Broker
SPO Partners II, L.P. 07/28/09 Sell 2,766 16.01 Open Market/Broker
SPO Partners II, L.P. 07/28/09 Sell 3,556 16.02 Open Market/Broker
SPO Partners II, L.P. 07/28/09 Sell 2,173 16.03 Open Market/Broker
SPO Partners II, L.P. 07/28/09 Sell 4,253 16.04 Open Market/Broker
SPO Partners II, L.P. 07/28/09 Sell 1,383 16.05 Open Market/Broker
SPO Partners II, L.P. 07/28/09 Sell 1,868 16.06 Open Market/Broker
SPO Partners II, L.P. 07/28/09 Sell 1,489 16.07 Open Market/Broker
SPO Partners II, L.P. 07/28/09 Sell 791 16.08 Open Market/Broker
SPO Partners II, L.P. 07/28/09 Sell 1,087 16.09 Open Market/Broker
SPO Partners II, L.P. 07/28/09 Sell 593 16.10 Open Market/Broker
SPO Partners II, L.P. 07/28/09 Sell 1,091 16.11 Open Market/Broker
SPO Partners II, L.P. 07/28/09 Sell 198 16.12 Open Market/Broker
SPO Partners II, L.P. 07/28/09 Sell 1,185 16.13 Open Market/Broker
SPO Partners II, L.P. 07/28/09 Sell 692 16.14 Open Market/Broker
SPO Partners II, L.P. 07/28/09 Sell 494 16.15 Open Market/Broker
SPO Partners II, L.P. 07/28/09 Sell 395 16.16 Open Market/Broker
SPO Partners II, L.P. 07/28/09 Sell 206 16.18 Open Market/Broker
SPO Partners II, L.P. 07/28/09 Sell 296 16.19 Open Market/Broker
SPO Partners II, L.P. 07/28/09 Sell 889 16.20 Open Market/Broker
SPO Partners II, L.P. 07/28/09 Sell 300 16.21 Open Market/Broker
SPO Partners II, L.P. 07/28/09 Sell 593 16.22 Open Market/Broker
SPO Partners II, L.P. 07/28/09 Sell 395 16.23 Open Market/Broker
SPO Partners II, L.P. 07/28/09 Sell 198 16.24 Open Market/Broker
SPO Partners II, L.P. 07/28/09 Sell 99 16.25 Open Market/Broker
SPO Partners II, L.P. 07/28/09 Sell 889 16.27 Open Market/Broker
SPO Partners II, L.P. 07/28/09 Sell 99 16.28 Open Market/Broker
SPO Partners II, L.P. 07/28/09 Sell 692 16.29 Open Market/Broker

Page 23 of 37 pages

SCHEDULE I TO SCHEDULE 13D

SPO Partners II, L.P. 07/28/09 Sell 198 16.30 Open Market/Broker
SPO Partners II, L.P. 07/28/09 Sell 491 16.31 Open Market/Broker
SPO Partners II, L.P. 07/28/09 Sell 198 16.32 Open Market/Broker
SPO Partners II, L.P. 07/28/09 Sell 593 16.33 Open Market/Broker
SPO Partners II, L.P. 07/28/09 Sell 417 16.34 Open Market/Broker
SPO Partners II, L.P. 07/28/09 Sell 494 16.35 Open Market/Broker
SPO Partners II, L.P. 07/28/09 Sell 395 16.36 Open Market/Broker
SPO Partners II, L.P. 07/28/09 Sell 99 16.38 Open Market/Broker
SPO Partners II, L.P. 07/28/09 Sell 94 16.41 Open Market/Broker
The Elizabeth R. and William J. Patterson 07/28/09 Sell 44 16.00 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/28/09 Sell 5 16.01 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/28/09 Sell 6 16.02 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/28/09 Sell 4 16.03 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/28/09 Sell 8 16.04 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/28/09 Sell 2 16.05 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/28/09 Sell 3 16.06 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/28/09 Sell 3 16.07 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/28/09 Sell 1 16.08 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/28/09 Sell 2 16.09 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/28/09 Sell 1 16.10 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/28/09 Sell 2 16.11 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/28/09 Sell 2 16.13 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/28/09 Sell 1 16.14 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/28/09 Sell 1 16.15 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/28/09 Sell 1 16.16 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/28/09 Sell 1 16.19 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/28/09 Sell 2 16.20 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/28/09 Sell 1 16.21 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/28/09 Sell 1 16.22 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/28/09 Sell 1 16.23 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/28/09 Sell 2 16.27 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/28/09 Sell 1 16.29 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/28/09 Sell 1 16.31 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/28/09 Sell 1 16.33 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/28/09 Sell 1 16.34 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/28/09 Sell 1 16.35 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/28/09 Sell 1 16.36 Open Market/Broker
Foundation
William E. Oberndorf IRA 07/28/09 Sell 263 16.00 Open Market/Broker
William E. Oberndorf IRA 07/28/09 Sell 29 16.01 Open Market/Broker
William E. Oberndorf IRA 07/28/09 Sell 38 16.02 Open Market/Broker

Page 24 of 37 pages

SCHEDULE I TO SCHEDULE 13D

William E. Oberndorf IRA 07/28/09 Sell 23 16.03 Open Market/Broker
William E. Oberndorf IRA 07/28/09 Sell 45 16.04 Open Market/Broker
William E. Oberndorf IRA 07/28/09 Sell 15 16.05 Open Market/Broker
William E. Oberndorf IRA 07/28/09 Sell 20 16.06 Open Market/Broker
William E. Oberndorf IRA 07/28/09 Sell 16 16.07 Open Market/Broker
William E. Oberndorf IRA 07/28/09 Sell 8 16.08 Open Market/Broker
William E. Oberndorf IRA 07/28/09 Sell 12 16.09 Open Market/Broker
William E. Oberndorf IRA 07/28/09 Sell 6 16.10 Open Market/Broker
William E. Oberndorf IRA 07/28/09 Sell 12 16.11 Open Market/Broker
William E. Oberndorf IRA 07/28/09 Sell 2 16.12 Open Market/Broker
William E. Oberndorf IRA 07/28/09 Sell 13 16.13 Open Market/Broker
William E. Oberndorf IRA 07/28/09 Sell 7 16.14 Open Market/Broker
William E. Oberndorf IRA 07/28/09 Sell 5 16.15 Open Market/Broker
William E. Oberndorf IRA 07/28/09 Sell 4 16.16 Open Market/Broker
William E. Oberndorf IRA 07/28/09 Sell 2 16.18 Open Market/Broker
William E. Oberndorf IRA 07/28/09 Sell 3 16.19 Open Market/Broker
William E. Oberndorf IRA 07/28/09 Sell 9 16.20 Open Market/Broker
William E. Oberndorf IRA 07/28/09 Sell 3 16.21 Open Market/Broker
William E. Oberndorf IRA 07/28/09 Sell 6 16.22 Open Market/Broker
William E. Oberndorf IRA 07/28/09 Sell 4 16.23 Open Market/Broker
William E. Oberndorf IRA 07/28/09 Sell 2 16.24 Open Market/Broker
William E. Oberndorf IRA 07/28/09 Sell 1 16.25 Open Market/Broker
William E. Oberndorf IRA 07/28/09 Sell 9 16.27 Open Market/Broker
William E. Oberndorf IRA 07/28/09 Sell 1 16.28 Open Market/Broker
William E. Oberndorf IRA 07/28/09 Sell 7 16.29 Open Market/Broker
William E. Oberndorf IRA 07/28/09 Sell 2 16.30 Open Market/Broker
William E. Oberndorf IRA 07/28/09 Sell 5 16.31 Open Market/Broker
William E. Oberndorf IRA 07/28/09 Sell 2 16.32 Open Market/Broker
William E. Oberndorf IRA 07/28/09 Sell 6 16.33 Open Market/Broker
William E. Oberndorf IRA 07/28/09 Sell 4 16.34 Open Market/Broker
William E. Oberndorf IRA 07/28/09 Sell 5 16.35 Open Market/Broker
William E. Oberndorf IRA 07/28/09 Sell 4 16.36 Open Market/Broker
William E. Oberndorf IRA 07/28/09 Sell 1 16.38 Open Market/Broker
William E. Oberndorf IRA 07/28/09 Sell 6 16.41 Open Market/Broker
SPO Partners II, L.P. 07/29/09 Sell 10,192 16.00 Open Market/Broker
SPO Partners II, L.P. 07/29/09 Sell 99 16.00 Open Market/Broker
SPO Partners II, L.P. 07/29/09 Sell 99 16.01 Open Market/Broker
SPO Partners II, L.P. 07/29/09 Sell 1,582 16.01 Open Market/Broker
SPO Partners II, L.P. 07/29/09 Sell 1,879 16.02 Open Market/Broker
SPO Partners II, L.P. 07/29/09 Sell 791 16.03 Open Market/Broker

Page 25 of 37 pages

SCHEDULE I TO SCHEDULE 13D

SPO Partners II, L.P. 07/29/09 Sell 2,960 16.04 Open Market/Broker
SPO Partners II, L.P. 07/29/09 Sell 98 16.06 Open Market/Broker
William E. Oberndorf IRA 07/29/09 Sell 115 16.00 Open Market/Broker
William E. Oberndorf IRA 07/29/09 Sell 1 16.00 Open Market/Broker
William E. Oberndorf IRA 07/29/09 Sell 1 16.01 Open Market/Broker
William E. Oberndorf IRA 07/29/09 Sell 18 16.01 Open Market/Broker
William E. Oberndorf IRA 07/29/09 Sell 21 16.02 Open Market/Broker
William E. Oberndorf IRA 07/29/09 Sell 9 16.03 Open Market/Broker
William E. Oberndorf IRA 07/29/09 Sell 33 16.04 Open Market/Broker
William E. Oberndorf IRA 07/29/09 Sell 2 16.06 Open Market/Broker
SPO Partners II, L.P. 07/30/09 Sell 44,865 18.50 Open Market/Broker
SPO Partners II, L.P. 07/30/09 Sell 2,859 18.51 Open Market/Broker
SPO Partners II, L.P. 07/30/09 Sell 5,659 18.52 Open Market/Broker
SPO Partners II, L.P. 07/30/09 Sell 2,661 18.53 Open Market/Broker
SPO Partners II, L.P. 07/30/09 Sell 2,859 18.54 Open Market/Broker
SPO Partners II, L.P. 07/30/09 Sell 5,717 18.55 Open Market/Broker
SPO Partners II, L.P. 07/30/09 Sell 2,563 18.56 Open Market/Broker
SPO Partners II, L.P. 07/30/09 Sell 2,563 18.57 Open Market/Broker
SPO Partners II, L.P. 07/30/09 Sell 2,760 18.58 Open Market/Broker
SPO Partners II, L.P. 07/30/09 Sell 2,168 18.59 Open Market/Broker
SPO Partners II, L.P. 07/30/09 Sell 2,711 18.60 Open Market/Broker
SPO Partners II, L.P. 07/30/09 Sell 6,014 18.61 Open Market/Broker
SPO Partners II, L.P. 07/30/09 Sell 5,027 18.62 Open Market/Broker
SPO Partners II, L.P. 07/30/09 Sell 4,436 18.63 Open Market/Broker
SPO Partners II, L.P. 07/30/09 Sell 8,478 18.64 Open Market/Broker
SPO Partners II, L.P. 07/30/09 Sell 7,098 18.65 Open Market/Broker
SPO Partners II, L.P. 07/30/09 Sell 3,155 18.66 Open Market/Broker
SPO Partners II, L.P. 07/30/09 Sell 985 18.67 Open Market/Broker
SPO Partners II, L.P. 07/30/09 Sell 1,774 18.68 Open Market/Broker
SPO Partners II, L.P. 07/30/09 Sell 2,168 18.69 Open Market/Broker
SPO Partners II, L.P. 07/30/09 Sell 1,680 18.70 Open Market/Broker
The Elizabeth R. and William J. Patterson 07/30/09 Sell 114 18.50 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/30/09 Sell 7 18.51 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/30/09 Sell 14 18.52 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/30/09 Sell 7 18.53 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/30/09 Sell 7 18.54 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/30/09 Sell 15 18.55 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/30/09 Sell 7 18.56 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/30/09 Sell 7 18.57 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/30/09 Sell 7 18.58 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/30/09 Sell 6 18.59 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/30/09 Sell 7 18.60 Open Market/Broker
Foundation

Page 26 of 37 pages

SCHEDULE I TO SCHEDULE 13D

The Elizabeth R. and William J. Patterson 07/30/09 Sell 15 18.61 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/30/09 Sell 13 18.62 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/30/09 Sell 11 18.63 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/30/09 Sell 22 18.64 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/30/09 Sell 18 18.65 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/30/09 Sell 8 18.66 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/30/09 Sell 3 18.67 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/30/09 Sell 5 18.68 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/30/09 Sell 6 18.69 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/30/09 Sell 1 18.70 Open Market/Broker
Foundation
William E. Oberndorf IRA 07/30/09 Sell 531 18.50 Open Market/Broker
William E. Oberndorf IRA 07/30/09 Sell 34 18.51 Open Market/Broker
William E. Oberndorf IRA 07/30/09 Sell 67 18.52 Open Market/Broker
William E. Oberndorf IRA 07/30/09 Sell 32 18.53 Open Market/Broker
William E. Oberndorf IRA 07/30/09 Sell 34 18.54 Open Market/Broker
William E. Oberndorf IRA 07/30/09 Sell 68 18.55 Open Market/Broker
William E. Oberndorf IRA 07/30/09 Sell 30 18.56 Open Market/Broker
William E. Oberndorf IRA 07/30/09 Sell 30 18.57 Open Market/Broker
William E. Oberndorf IRA 07/30/09 Sell 33 18.58 Open Market/Broker
William E. Oberndorf IRA 07/30/09 Sell 26 18.59 Open Market/Broker
William E. Oberndorf IRA 07/30/09 Sell 32 18.60 Open Market/Broker
William E. Oberndorf IRA 07/30/09 Sell 71 18.61 Open Market/Broker
William E. Oberndorf IRA 07/30/09 Sell 60 18.62 Open Market/Broker
William E. Oberndorf IRA 07/30/09 Sell 53 18.63 Open Market/Broker
William E. Oberndorf IRA 07/30/09 Sell 100 18.64 Open Market/Broker
William E. Oberndorf IRA 07/30/09 Sell 84 18.65 Open Market/Broker
William E. Oberndorf IRA 07/30/09 Sell 37 18.66 Open Market/Broker
William E. Oberndorf IRA 07/30/09 Sell 12 18.67 Open Market/Broker
William E. Oberndorf IRA 07/30/09 Sell 21 18.68 Open Market/Broker
William E. Oberndorf IRA 07/30/09 Sell 26 18.69 Open Market/Broker
William E. Oberndorf IRA 07/30/09 Sell 19 18.70 Open Market/Broker
SPO Partners II, L.P. 07/31/09 Sell 19,827 18.50 Open Market/Broker
SPO Partners II, L.P. 07/31/09 Sell 1,579 18.51 Open Market/Broker
SPO Partners II, L.P. 07/31/09 Sell 394 18.52 Open Market/Broker
The Elizabeth R. and William J. Patterson 07/31/09 Sell 91 18.50 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/31/09 Sell 7 18.51 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 07/31/09 Sell 2 18.52 Open Market/Broker
Foundation
William E. Oberndorf IRA 07/31/09 Sell 182 18.50 Open Market/Broker
William E. Oberndorf IRA 07/31/09 Sell 14 18.51 Open Market/Broker
William E. Oberndorf IRA 07/31/09 Sell 4 18.52 Open Market/Broker
SPO Partners II, L.P. 08/03/09 Sell 2,170 18.00 Open Market/Broker
SPO Partners II, L.P. 08/03/09 Sell 1,184 18.01 Open Market/Broker
SPO Partners II, L.P. 08/03/09 Sell 1,578 18.02 Open Market/Broker

Page 27 of 37 pages

SCHEDULE I TO SCHEDULE 13D

SPO Partners II, L.P. 08/03/09 Sell 1,282 18.03 Open Market/Broker
SPO Partners II, L.P. 08/03/09 Sell 982 18.04 Open Market/Broker
SPO Partners II, L.P. 08/03/09 Sell 597 18.05 Open Market/Broker
SPO Partners II, L.P. 08/03/09 Sell 1,776 18.06 Open Market/Broker
SPO Partners II, L.P. 08/03/09 Sell 1,184 18.07 Open Market/Broker
SPO Partners II, L.P. 08/03/09 Sell 1,974 18.08 Open Market/Broker
SPO Partners II, L.P. 08/03/09 Sell 1,229 18.09 Open Market/Broker
SPO Partners II, L.P. 08/03/09 Sell 1,282 18.10 Open Market/Broker
SPO Partners II, L.P. 08/03/09 Sell 888 18.11 Open Market/Broker
SPO Partners II, L.P. 08/03/09 Sell 1,480 18.12 Open Market/Broker
SPO Partners II, L.P. 08/03/09 Sell 1,776 18.13 Open Market/Broker
SPO Partners II, L.P. 08/03/09 Sell 1,941 18.14 Open Market/Broker
SPO Partners II, L.P. 08/03/09 Sell 2,203 18.15 Open Market/Broker
SPO Partners II, L.P. 08/03/09 Sell 2,170 18.16 Open Market/Broker
SPO Partners II, L.P. 08/03/09 Sell 987 18.17 Open Market/Broker
SPO Partners II, L.P. 08/03/09 Sell 592 18.18 Open Market/Broker
SPO Partners II, L.P. 08/03/09 Sell 99 18.19 Open Market/Broker
SPO Partners II, L.P. 08/03/09 Sell 1,549 18.20 Open Market/Broker
SPO Partners II, L.P. 08/03/09 Sell 99 18.21 Open Market/Broker
SPO Partners II, L.P. 08/03/09 Sell 106,309 18.22 Open Market/Broker
SPO Partners II, L.P. 08/03/09 Sell 2,071 18.24 Open Market/Broker
SPO Partners II, L.P. 08/03/09 Sell 1,705 18.25 Open Market/Broker
SPO Partners II, L.P. 08/03/09 Sell 198 18.26 Open Market/Broker
SPO Partners II, L.P. 08/03/09 Sell 651 18.27 Open Market/Broker
SPO Partners II, L.P. 08/03/09 Sell 99 18.28 Open Market/Broker
SPO Partners II, L.P. 08/03/09 Sell 861 18.29 Open Market/Broker
SPO Partners II, L.P. 08/03/09 Sell 199,750 18.30 Open Market/Broker
SPO Partners II, L.P. 08/03/09 Sell 2,170 18.31 Open Market/Broker
SPO Partners II, L.P. 08/03/09 Sell 1,086 18.32 Open Market/Broker
SPO Partners II, L.P. 08/03/09 Sell 99 18.33 Open Market/Broker
SPO Partners II, L.P. 08/03/09 Sell 198 18.34 Open Market/Broker
SPO Partners II, L.P. 08/03/09 Sell 49 18.35 Open Market/Broker
SPO Partners II, L.P. 08/03/09 Sell 49 18.38 Open Market/Broker
SPO Partners II, L.P. 08/03/09 Sell 99 18.39 Open Market/Broker
SPO Partners II, L.P. 08/03/09 Sell 1,875 18.40 Open Market/Broker
SPO Partners II, L.P. 08/03/09 Sell 1,282 18.41 Open Market/Broker
SPO Partners II, L.P. 08/03/09 Sell 1,974 18.42 Open Market/Broker
SPO Partners II, L.P. 08/03/09 Sell 4,439 18.43 Open Market/Broker
SPO Partners II, L.P. 08/03/09 Sell 6,019 18.44 Open Market/Broker
SPO Partners II, L.P. 08/03/09 Sell 6,610 18.45 Open Market/Broker
SPO Partners II, L.P. 08/03/09 Sell 1,381 18.46 Open Market/Broker
SPO Partners II, L.P. 08/03/09 Sell 3,887 18.47 Open Market/Broker
SPO Partners II, L.P. 08/03/09 Sell 1,293 18.48 Open Market/Broker

Page 28 of 37 pages

SCHEDULE I TO SCHEDULE 13D

SPO Partners II, L.P. 08/03/09 Sell 4,931 18.49 Open Market/Broker
SPO Partners II, L.P. 08/03/09 Sell 3,552 18.50 Open Market/Broker
SPO Partners II, L.P. 08/03/09 Sell 2,170 18.51 Open Market/Broker
SPO Partners II, L.P. 08/03/09 Sell 888 18.52 Open Market/Broker
SPO Partners II, L.P. 08/03/09 Sell 1,282 18.53 Open Market/Broker
SPO Partners II, L.P. 08/03/09 Sell 4,733 18.54 Open Market/Broker
SPO Partners II, L.P. 08/03/09 Sell 5,131 18.55 Open Market/Broker
SPO Partners II, L.P. 08/03/09 Sell 2,271 18.56 Open Market/Broker
SPO Partners II, L.P. 08/03/09 Sell 4,735 18.57 Open Market/Broker
SPO Partners II, L.P. 08/03/09 Sell 5,306 18.58 Open Market/Broker
SPO Partners II, L.P. 08/03/09 Sell 9,854 18.59 Open Market/Broker
SPO Partners II, L.P. 08/03/09 Sell 60,279 18.60 Open Market/Broker
SPO Partners II, L.P. 08/03/09 Sell 3,650 18.61 Open Market/Broker
SPO Partners II, L.P. 08/03/09 Sell 3,340 18.62 Open Market/Broker
SPO Partners II, L.P. 08/03/09 Sell 2,664 18.63 Open Market/Broker
SPO Partners II, L.P. 08/03/09 Sell 4,045 18.64 Open Market/Broker
SPO Partners II, L.P. 08/03/09 Sell 293 18.65 Open Market/Broker
The Elizabeth R. and William J. Patterson 08/03/09 Sell 5 18.00 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/03/09 Sell 3 18.01 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/03/09 Sell 4 18.02 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/03/09 Sell 3 18.03 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/03/09 Sell 2 18.04 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/03/09 Sell 1 18.05 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/03/09 Sell 4 18.06 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/03/09 Sell 3 18.07 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/03/09 Sell 4 18.08 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/03/09 Sell 3 18.09 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/03/09 Sell 3 18.10 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/03/09 Sell 2 18.11 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/03/09 Sell 3 18.12 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/03/09 Sell 4 18.13 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/03/09 Sell 4 18.14 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/03/09 Sell 5 18.15 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/03/09 Sell 5 18.16 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/03/09 Sell 2 18.17 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/03/09 Sell 1 18.18 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/03/09 Sell 3 18.20 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/03/09 Sell 238 18.22 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/03/09 Sell 5 18.24 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/03/09 Sell 4 18.25 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/03/09 Sell 1 18.27 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/03/09 Sell 2 18.29 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/03/09 Sell 446 18.30 Open Market/Broker
Foundation

Page 29 of 37 pages

SCHEDULE I TO SCHEDULE 13D

The Elizabeth R. and William J. Patterson 08/03/09 Sell 5 18.31 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/03/09 Sell 2 18.32 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/03/09 Sell 4 18.40 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/03/09 Sell 3 18.41 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/03/09 Sell 4 18.42 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/03/09 Sell 10 18.43 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/03/09 Sell 13 18.44 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/03/09 Sell 15 18.45 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/03/09 Sell 3 18.46 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/03/09 Sell 9 18.47 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/03/09 Sell 3 18.48 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/03/09 Sell 11 18.49 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/03/09 Sell 8 18.50 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/03/09 Sell 5 18.51 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/03/09 Sell 2 18.52 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/03/09 Sell 3 18.53 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/03/09 Sell 11 18.54 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/03/09 Sell 11 18.55 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/03/09 Sell 5 18.56 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/03/09 Sell 11 18.57 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/03/09 Sell 12 18.58 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/03/09 Sell 22 18.59 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/03/09 Sell 135 18.60 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/03/09 Sell 8 18.61 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/03/09 Sell 7 18.62 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/03/09 Sell 6 18.63 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/03/09 Sell 9 18.64 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/03/09 Sell 3 18.65 Open Market/Broker
Foundation
William E. Oberndorf IRA 08/03/09 Sell 25 18.00 Open Market/Broker
William E. Oberndorf IRA 08/03/09 Sell 13 18.01 Open Market/Broker
William E. Oberndorf IRA 08/03/09 Sell 18 18.02 Open Market/Broker
William E. Oberndorf IRA 08/03/09 Sell 15 18.03 Open Market/Broker
William E. Oberndorf IRA 08/03/09 Sell 11 18.04 Open Market/Broker
William E. Oberndorf IRA 08/03/09 Sell 7 18.05 Open Market/Broker
William E. Oberndorf IRA 08/03/09 Sell 20 18.06 Open Market/Broker
William E. Oberndorf IRA 08/03/09 Sell 13 18.07 Open Market/Broker
William E. Oberndorf IRA 08/03/09 Sell 22 18.08 Open Market/Broker
William E. Oberndorf IRA 08/03/09 Sell 14 18.09 Open Market/Broker
William E. Oberndorf IRA 08/03/09 Sell 15 18.10 Open Market/Broker
William E. Oberndorf IRA 08/03/09 Sell 10 18.11 Open Market/Broker
William E. Oberndorf IRA 08/03/09 Sell 17 18.12 Open Market/Broker
William E. Oberndorf IRA 08/03/09 Sell 20 18.13 Open Market/Broker
William E. Oberndorf IRA 08/03/09 Sell 22 18.14 Open Market/Broker

Page 30 of 37 pages

SCHEDULE I TO SCHEDULE 13D

William E. Oberndorf IRA 08/03/09 Sell 25 18.15 Open Market/Broker
William E. Oberndorf IRA 08/03/09 Sell 25 18.16 Open Market/Broker
William E. Oberndorf IRA 08/03/09 Sell 11 18.17 Open Market/Broker
William E. Oberndorf IRA 08/03/09 Sell 7 18.18 Open Market/Broker
William E. Oberndorf IRA 08/03/09 Sell 1 18.19 Open Market/Broker
William E. Oberndorf IRA 08/03/09 Sell 18 18.20 Open Market/Broker
William E. Oberndorf IRA 08/03/09 Sell 1 18.21 Open Market/Broker
William E. Oberndorf IRA 08/03/09 Sell 1,209 18.22 Open Market/Broker
William E. Oberndorf IRA 08/03/09 Sell 24 18.24 Open Market/Broker
William E. Oberndorf IRA 08/03/09 Sell 19 18.25 Open Market/Broker
William E. Oberndorf IRA 08/03/09 Sell 2 18.26 Open Market/Broker
William E. Oberndorf IRA 08/03/09 Sell 7 18.27 Open Market/Broker
William E. Oberndorf IRA 08/03/09 Sell 1 18.28 Open Market/Broker
William E. Oberndorf IRA 08/03/09 Sell 10 18.29 Open Market/Broker
William E. Oberndorf IRA 08/03/09 Sell 2,272 18.30 Open Market/Broker
William E. Oberndorf IRA 08/03/09 Sell 25 18.31 Open Market/Broker
William E. Oberndorf IRA 08/03/09 Sell 12 18.32 Open Market/Broker
William E. Oberndorf IRA 08/03/09 Sell 1 18.33 Open Market/Broker
William E. Oberndorf IRA 08/03/09 Sell 2 18.34 Open Market/Broker
William E. Oberndorf IRA 08/03/09 Sell 1 18.35 Open Market/Broker
William E. Oberndorf IRA 08/03/09 Sell 1 18.38 Open Market/Broker
William E. Oberndorf IRA 08/03/09 Sell 1 18.39 Open Market/Broker
William E. Oberndorf IRA 08/03/09 Sell 21 18.40 Open Market/Broker
William E. Oberndorf IRA 08/03/09 Sell 15 18.41 Open Market/Broker
William E. Oberndorf IRA 08/03/09 Sell 22 18.42 Open Market/Broker
William E. Oberndorf IRA 08/03/09 Sell 51 18.43 Open Market/Broker
William E. Oberndorf IRA 08/03/09 Sell 68 18.44 Open Market/Broker
William E. Oberndorf IRA 08/03/09 Sell 75 18.45 Open Market/Broker
William E. Oberndorf IRA 08/03/09 Sell 16 18.46 Open Market/Broker
William E. Oberndorf IRA 08/03/09 Sell 44 18.47 Open Market/Broker
William E. Oberndorf IRA 08/03/09 Sell 15 18.48 Open Market/Broker
William E. Oberndorf IRA 08/03/09 Sell 56 18.49 Open Market/Broker
William E. Oberndorf IRA 08/03/09 Sell 40 18.50 Open Market/Broker
William E. Oberndorf IRA 08/03/09 Sell 25 18.51 Open Market/Broker
William E. Oberndorf IRA 08/03/09 Sell 10 18.52 Open Market/Broker
William E. Oberndorf IRA 08/03/09 Sell 15 18.53 Open Market/Broker
William E. Oberndorf IRA 08/03/09 Sell 54 18.54 Open Market/Broker
William E. Oberndorf IRA 08/03/09 Sell 58 18.55 Open Market/Broker
William E. Oberndorf IRA 08/03/09 Sell 26 18.56 Open Market/Broker
William E. Oberndorf IRA 08/03/09 Sell 54 18.57 Open Market/Broker
William E. Oberndorf IRA 08/03/09 Sell 60 18.58 Open Market/Broker
William E. Oberndorf IRA 08/03/09 Sell 112 18.59 Open Market/Broker
William E. Oberndorf IRA 08/03/09 Sell 686 18.60 Open Market/Broker

Page 31 of 37 pages

SCHEDULE I TO SCHEDULE 13D

William E. Oberndorf IRA 08/03/09 Sell 42 18.61 Open Market/Broker
William E. Oberndorf IRA 08/03/09 Sell 38 18.62 Open Market/Broker
William E. Oberndorf IRA 08/03/09 Sell 30 18.63 Open Market/Broker
William E. Oberndorf IRA 08/03/09 Sell 46 18.64 Open Market/Broker
William E. Oberndorf IRA 08/03/09 Sell 4 18.65 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 99 19.25 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 789 19.26 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 1,184 19.27 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 690 19.28 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 690 19.29 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 198 19.30 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 1,086 19.31 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 690 19.32 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 1,480 19.33 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 592 19.34 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 1,086 19.35 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 2,085 19.36 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 1,382 19.37 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 1,480 19.38 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 2,369 19.39 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 30,560 19.40 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 3,567 19.41 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 1,677 19.42 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 1,776 19.43 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 2,171 19.44 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 18,461 19.45 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 12,436 19.46 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 3,072 19.47 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 28,547 19.48 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 13,059 19.49 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 9,572 19.50 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 1,395 19.51 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 690 19.52 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 198 19.53 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 296 19.54 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 99 19.55 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 888 19.56 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 1,283 19.57 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 592 19.58 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 1,182 19.59 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 493 19.60 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 1,283 19.61 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 989 19.62 Open Market/Broker

Page 32 of 37 pages

SCHEDULE I TO SCHEDULE 13D

SPO Partners II, L.P. 08/04/09 Sell 1,086 19.63 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 2,270 19.64 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 12,425 19.65 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 44,433 19.66 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 56,492 19.67 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 7,009 19.68 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 6,908 19.69 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 21,626 19.70 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 3,965 19.71 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 6,841 19.72 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 10,064 19.73 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 7,554 19.74 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 4,371 19.75 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 3,326 19.76 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 1,924 19.77 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 2,761 19.78 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 2,936 19.79 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 1,086 19.80 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 687 19.81 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 793 19.82 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 2,843 19.83 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 1,974 19.84 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 2,369 19.85 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 2,270 19.86 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 3,030 19.87 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 3,750 19.88 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 6,512 19.89 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 7,689 19.90 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 4,440 19.91 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 2,565 19.92 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 5,238 19.93 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 4,211 19.94 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 4,046 19.95 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 3,465 19.96 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 2,369 19.97 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 2,369 19.98 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 2,960 19.99 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 13,778 20.00 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 1,516 20.01 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 1,086 20.02 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 1,875 20.03 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 3,194 20.04 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 7,302 20.05 Open Market/Broker

Page 33 of 37 pages

SCHEDULE I TO SCHEDULE 13D

SPO Partners II, L.P. 08/04/09 Sell 2,270 20.06 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 2,600 20.07 Open Market/Broker
SPO Partners II, L.P. 08/04/09 Sell 2,536 20.08 Open Market/Broker
The Elizabeth R. and William J. Patterson 08/04/09 Sell 2 19.26 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 3 19.27 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 2 19.28 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 2 19.29 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 2 19.31 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 2 19.32 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 3 19.33 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 1 19.34 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 2 19.35 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 5 19.36 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 3 19.37 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 3 19.38 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 5 19.39 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 68 19.40 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 8 19.41 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 4 19.42 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 4 19.43 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 5 19.44 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 41 19.45 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 28 19.46 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 7 19.47 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 64 19.48 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 29 19.49 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 21 19.50 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 3 19.51 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 2 19.52 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 1 19.54 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 2 19.56 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 3 19.57 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 1 19.58 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 3 19.59 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 1 19.60 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 3 19.61 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 2 19.62 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 2 19.63 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 5 19.64 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 28 19.65 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 99 19.66 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 126 19.67 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 16 19.68 Open Market/Broker
Foundation

Page 34 of 37 pages

SCHEDULE I TO SCHEDULE 13D

The Elizabeth R. and William J. Patterson 08/04/09 Sell 15 19.69 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 48 19.70 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 9 19.71 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 15 19.72 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 23 19.73 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 17 19.74 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 10 19.75 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 7 19.76 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 4 19.77 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 6 19.78 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 7 19.79 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 2 19.80 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 2 19.81 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 2 19.82 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 6 19.83 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 4 19.84 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 5 19.85 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 5 19.86 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 7 19.87 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 8 19.88 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 15 19.89 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 17 19.90 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 10 19.91 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 6 19.92 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 12 19.93 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 9 19.94 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 9 19.95 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 8 19.96 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 5 19.97 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 5 19.98 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 7 19.99 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 31 20.00 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 3 20.01 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 2 20.02 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 4 20.03 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 7 20.04 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 16 20.05 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 5 20.06 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 6 20.07 Open Market/Broker
Foundation
The Elizabeth R. and William J. Patterson 08/04/09 Sell 10 20.08 Open Market/Broker
Foundation
William E. Oberndorf IRA 08/04/09 Sell 1 19.25 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 9 19.26 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 13 19.27 Open Market/Broker

Page 35 of 37 pages

SCHEDULE I TO SCHEDULE 13D

William E. Oberndorf IRA 08/04/09 Sell 8 19.28 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 8 19.29 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 2 19.30 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 12 19.31 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 8 19.32 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 17 19.33 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 7 19.34 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 12 19.35 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 23 19.36 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 15 19.37 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 17 19.38 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 26 19.39 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 342 19.40 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 40 19.41 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 19 19.42 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 20 19.43 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 24 19.44 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 206 19.45 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 139 19.46 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 34 19.47 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 319 19.48 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 146 19.49 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 107 19.50 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 16 19.51 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 8 19.52 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 2 19.53 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 3 19.54 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 1 19.55 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 10 19.56 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 14 19.57 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 7 19.58 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 13 19.59 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 6 19.60 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 14 19.61 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 11 19.62 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 12 19.63 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 25 19.64 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 139 19.65 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 497 19.66 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 632 19.67 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 78 19.68 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 77 19.69 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 242 19.70 Open Market/Broker

Page 36 of 37 pages

SCHEDULE I TO SCHEDULE 13D

William E. Oberndorf IRA 08/04/09 Sell 44 19.71 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 77 19.72 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 113 19.73 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 85 19.74 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 49 19.75 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 37 19.76 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 22 19.77 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 31 19.78 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 33 19.79 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 12 19.80 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 8 19.81 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 9 19.82 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 32 19.83 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 22 19.84 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 26 19.85 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 25 19.86 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 34 19.87 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 42 19.88 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 73 19.89 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 86 19.90 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 50 19.91 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 29 19.92 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 59 19.93 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 47 19.94 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 45 19.95 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 39 19.96 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 26 19.97 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 26 19.98 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 33 19.99 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 154 20.00 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 17 20.01 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 12 20.02 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 21 20.03 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 36 20.04 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 82 20.05 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 25 20.06 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 29 20.07 Open Market/Broker
William E. Oberndorf IRA 08/04/09 Sell 29 20.08 Open Market/Broker

Page 37 of 37 pages

EXHIBIT INDEX

EXHIBIT DOCUMENT DESCRIPTION
- ------- ------------------------------------
A Agreement Pursuant to Rule 13d-1(k)

                                    EXHIBIT A

         Pursuant to Rule 13d-1(k) of Regulation 13D-G of the General Rules and
Regulations of the Securities and Exchange Commission under the Securities
Exchange Act of 1934, as amended, the undersigned agrees that the statement to
which this Exhibit is attached is filed on behalf of each of them in the
capacities set forth below.


Dated: August 5, 2009                    By:       /s/ Kim M. Silva
                                               --------------------------------
                                                   Kim M. Silva

                                           Attorney-in-Fact for:

                                           SPO PARTNERS II, L.P.(1)
                                           SPO ADVISORY PARTNERS, L.P.(1)
                                           SPO ADVISORY CORP.(1)
                                           JOHN H. SCULLY(1)
                                           WILLIAM E. OBERNDORF(1)
                                           WILLIAM J. PATTERSON(1)
                                           EDWARD H. MCDERMOTT(1)
                                           WILLIAM AND SUSAN OBERNDORF TRUST,
                                              DATED 10/19/98 (1)
                                           OBERNDORF FAMILY PARTNERS (1)
                                           THE ELIZABETH R. & WILLIAM J.
                                             PATTERSON FOUNDATION (1)
                                           IAN R. MCGUIRE (1)
                                           BETTY JANE WEIMER (1)

                                           (1) A Power of Attorney
                                           authorizing Kim M. Silva to
                                           act on behalf of this
                                           person or entity has been previously
                                           filed with the Securities and
                                           Exchange Commission.