SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. 9)* LAMAR ADVERTISING COMPANY (Name of Issuer) CLASS A COMMON STOCK, PAR VALUE $0.001 PER SHARE (Title of Class of Securities) 512815101 (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) July 2, 2008 (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 1 of 25 pages -------------------------------------------------------------------------------- 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(e) OR 2(f) [_] -------------------------------------------------------------------------------- 6. CITIZENSHIP OR PLACE OF ORGANIZATION Delaware -------------------------------------------------------------------------------- 7. SOLE VOTING POWER 15,918,384 (1) ------------------------------------------------------ NUMBER OF SHARES 8. SHARED VOTING POWER BENEFICIALLY OWNED -0- BY EACH REPORTING ------------------------------------------------------ PERSON WITH 9. SOLE DISPOSITIVE POWER 15,918,384 (1) ------------------------------------------------------ 10. SHARED DISPOSITIVE POWER -0- -------------------------------------------------------------------------------- 11. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 15,918,384 -------------------------------------------------------------------------------- 12. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES [_] -------------------------------------------------------------------------------- 13. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 20.7% -------------------------------------------------------------------------------- 14. TYPE OF REPORTING PERSON PN -------------------------------------------------------------------------------- (1) Power is exercised through its sole general partner, SPO Advisory Partners, L.P. CUSIP No. 512815101 Page 2 of 25 pages -------------------------------------------------------------------------------- 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(e) OR 2(f) [_] -------------------------------------------------------------------------------- 6. CITIZENSHIP OR PLACE OF ORGANIZATION Delaware -------------------------------------------------------------------------------- 7. SOLE VOTING POWER 15,918,384 (1)(2) ------------------------------------------------------ NUMBER OF SHARES 8. SHARED VOTING POWER BENEFICIALLY OWNED -0- BY EACH REPORTING ------------------------------------------------------ PERSON WITH 9. SOLE DISPOSITIVE POWER 15,918,384 (1)(2) ------------------------------------------------------ 10. SHARED DISPOSITIVE POWER -0- -------------------------------------------------------------------------------- 11. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 15,918,384 -------------------------------------------------------------------------------- 12. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES [_] -------------------------------------------------------------------------------- 13. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 20.7% -------------------------------------------------------------------------------- 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. CUSIP No. 512815101 Page 3 of 25 pages -------------------------------------------------------------------------------- 1. NAME OF REPORTING PERSON San Francisco 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(e) OR 2(f) [_] -------------------------------------------------------------------------------- 6. CITIZENSHIP OR PLACE OF ORGANIZATION California -------------------------------------------------------------------------------- 7. SOLE VOTING POWER 735,730 (1) ------------------------------------------------------ NUMBER OF SHARES 8. SHARED VOTING POWER BENEFICIALLY OWNED -0- BY EACH REPORTING ------------------------------------------------------ PERSON WITH 9. SOLE DISPOSITIVE POWER 735,730 (1) ------------------------------------------------------ 10. SHARED DISPOSITIVE POWER -0- -------------------------------------------------------------------------------- 11. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 735,730 -------------------------------------------------------------------------------- 12. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES [_] -------------------------------------------------------------------------------- 13. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 1.0% -------------------------------------------------------------------------------- 14. TYPE OF REPORTING PERSON PN -------------------------------------------------------------------------------- (1) Power is exercised through its sole general partner, SF Advisory Partners, L.P. CUSIP No. 512815101 Page 4 of 25 pages -------------------------------------------------------------------------------- 1. NAME OF REPORTING PERSON SF 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(e) OR 2(f) [_] -------------------------------------------------------------------------------- 6. CITIZENSHIP OR PLACE OF ORGANIZATION Delaware -------------------------------------------------------------------------------- 7. SOLE VOTING POWER 735,730 (1)(2) ------------------------------------------------------ NUMBER OF SHARES 8. SHARED VOTING POWER BENEFICIALLY OWNED -0- BY EACH REPORTING ------------------------------------------------------ PERSON WITH 9. SOLE DISPOSITIVE POWER 735,730 (1)(2) ------------------------------------------------------ 10. SHARED DISPOSITIVE POWER -0- -------------------------------------------------------------------------------- 11. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 735,730 -------------------------------------------------------------------------------- 12. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES [_] -------------------------------------------------------------------------------- 13. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 1.0% -------------------------------------------------------------------------------- 14. TYPE OF REPORTING PERSON PN -------------------------------------------------------------------------------- (1) Solely in its capacity as the sole general partner of San Francisco Partners II, L.P. (2) Power is exercised through its sole general partner, SPO Advisory Corp. CUSIP No. 512815101 Page 5 of 25 pages -------------------------------------------------------------------------------- 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(e) OR 2(f) [_] -------------------------------------------------------------------------------- 6. CITIZENSHIP OR PLACE OF ORGANIZATION Delaware -------------------------------------------------------------------------------- 7. SOLE VOTING POWER 16,654,114 (1)(2) ------------------------------------------------------ NUMBER OF SHARES 8. SHARED VOTING POWER BENEFICIALLY OWNED -0- BY EACH REPORTING ------------------------------------------------------ PERSON WITH 9. SOLE DISPOSITIVE POWER 16,654,114 (1)(2) ------------------------------------------------------ 10. SHARED DISPOSITIVE POWER -0- -------------------------------------------------------------------------------- 11. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 16,654,114 -------------------------------------------------------------------------------- 12. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES [_] -------------------------------------------------------------------------------- 13. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 21.6% -------------------------------------------------------------------------------- 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 15,918,384 of such shares; and solely in its capacity as the sole general partner of SF Advisory Partners, L.P. with respect to 735,730 of such shares. (2) Power is exercised through its three controlling persons, John H. Scully, William E. Oberndorf and William J. Patterson. CUSIP No. 512815101 Page 6 of 25 pages -------------------------------------------------------------------------------- 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(e) OR 2(f) [_] -------------------------------------------------------------------------------- 6. CITIZENSHIP OR PLACE OF ORGANIZATION USA -------------------------------------------------------------------------------- 7. SOLE VOTING POWER 303,300 (1) ------------------------------------------------------ NUMBER OF SHARES 8. SHARED VOTING POWER BENEFICIALLY OWNED 16,654,114 (2) BY EACH REPORTING ------------------------------------------------------ PERSON WITH 9. SOLE DISPOSITIVE POWER 303,300 (1) ------------------------------------------------------ 10. SHARED DISPOSITIVE POWER 16,654,114 (2) -------------------------------------------------------------------------------- 11. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 16,957,414 -------------------------------------------------------------------------------- 12. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES [_] -------------------------------------------------------------------------------- 13. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 22.0% -------------------------------------------------------------------------------- 14. TYPE OF REPORTING PERSON IN -------------------------------------------------------------------------------- (1) Of these shares, 18,700 shares are held in the John H. Scully Individual Retirement Accounts, which are self-directed, and 284,600 shares may be deemed to be beneficially owned by Mr. Scully solely in his capacity as controlling person, sole director and executive officer of Phoebe Snow Foundation, Inc. (2) These shares may be deemed to be beneficially owned by Mr. Scully solely in his capacity as one of three controlling persons of SPO Advisory Corp. CUSIP No. 512815101 Page 7 of 25 pages -------------------------------------------------------------------------------- 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 -------------------------------------------------------------------------------- 5. CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(e) OR 2(f) [_] -------------------------------------------------------------------------------- 6. CITIZENSHIP OR PLACE OF ORGANIZATION USA -------------------------------------------------------------------------------- 7. SOLE VOTING POWER 38,500 (1) ------------------------------------------------------ NUMBER OF SHARES 8. SHARED VOTING POWER BENEFICIALLY OWNED 16,654,114 (2) BY EACH REPORTING ------------------------------------------------------ PERSON WITH 9. SOLE DISPOSITIVE POWER 38,500 (1) ------------------------------------------------------ 10. SHARED DISPOSITIVE POWER 16,654,114 (2) -------------------------------------------------------------------------------- 11. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 16,692,614 -------------------------------------------------------------------------------- 12. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES [_] -------------------------------------------------------------------------------- 13. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 21.7% -------------------------------------------------------------------------------- 14. TYPE OF REPORTING PERSON IN -------------------------------------------------------------------------------- (1) These shares are held in the William E. Oberndorf Individual Retirement Account, which is self-directed. (2) These shares may be deemed to be beneficially owned by Mr. Oberndorf solely in his capacity as one of three controlling persons of SPO Advisory Corp. CUSIP No. 512815101 Page 8 of 25 pages -------------------------------------------------------------------------------- 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(e) OR 2(f) [_] -------------------------------------------------------------------------------- 6. CITIZENSHIP OR PLACE OF ORGANIZATION USA -------------------------------------------------------------------------------- 7. SOLE VOTING POWER 1,700 (1) ------------------------------------------------------ NUMBER OF SHARES 8. SHARED VOTING POWER BENEFICIALLY OWNED 16,704,914 (2) BY EACH REPORTING ------------------------------------------------------ PERSON WITH 9. SOLE DISPOSITIVE POWER 1,700 (1) ------------------------------------------------------ 10. SHARED DISPOSITIVE POWER 16,704,914 (2) -------------------------------------------------------------------------------- 11. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 16,706,614 -------------------------------------------------------------------------------- 12. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES [_] -------------------------------------------------------------------------------- 13. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 21.7% -------------------------------------------------------------------------------- 14. TYPE OF REPORTING PERSON IN -------------------------------------------------------------------------------- (1) These shares are held in the William J. Patterson Individual Retirement Account, which is self directed. (2) Of these shares, 16,654,114 shares may be deemed to be beneficially owned by Mr. Patterson solely in his capacity as one of three controlling persons of SPO Advisory Corp. and 50,800 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. CUSIP No. 512815101 Page 9 of 25 pages -------------------------------------------------------------------------------- 1. NAME OF REPORTING PERSON Phoebe Snow Foundation, Inc. -------------------------------------------------------------------------------- 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 284,600 (1) ------------------------------------------------------ NUMBER OF SHARES 8. SHARED VOTING POWER BENEFICIALLY OWNED -0- BY EACH REPORTING ------------------------------------------------------ PERSON WITH 9. SOLE DISPOSITIVE POWER 284,600 (1) ------------------------------------------------------ 10. SHARED DISPOSITIVE POWER -0- -------------------------------------------------------------------------------- 11. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 284,600 -------------------------------------------------------------------------------- 12. CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES [_] -------------------------------------------------------------------------------- 13. PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 0.4% -------------------------------------------------------------------------------- 14. TYPE OF REPORTING PERSON CO -------------------------------------------------------------------------------- (1) Power is exercised through its controlling person, sole director and executive officer, John H. Scully. CUSIP No. 512815101 Page 10 of 25 pages -------------------------------------------------------------------------------- 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 50,800 (1) ------------------------------------------------------ NUMBER OF SHARES 8. SHARED VOTING POWER BENEFICIALLY OWNED -0- BY EACH REPORTING ------------------------------------------------------ PERSON WITH 9. SOLE DISPOSITIVE POWER 50,800 (1) ------------------------------------------------------ 10. SHARED DISPOSITIVE POWER -0- -------------------------------------------------------------------------------- 11. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 50,800 -------------------------------------------------------------------------------- 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 -------------------------------------------------------------------------------- (1) Power is exercised through its controlling persons, directors and executive officers, William J. Patterson and Elizabeth R. Patterson. CUSIP No. 512815101 Page 11 of 25 pages -------------------------------------------------------------------------------- 1. NAME OF REPORTING PERSON Eli J. Weinberg -------------------------------------------------------------------------------- 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(f) [_] -------------------------------------------------------------------------------- 6. CITIZENSHIP OR PLACE OF ORGANIZATION USA -------------------------------------------------------------------------------- 7. SOLE VOTING POWER 126 ------------------------------------------------------ NUMBER OF SHARES 8. SHARED VOTING POWER BENEFICIALLY OWNED -0- BY EACH REPORTING ------------------------------------------------------ PERSON WITH 9. SOLE DISPOSITIVE POWER 126 ------------------------------------------------------ 10. SHARED DISPOSITIVE POWER -0- -------------------------------------------------------------------------------- 11. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 126 -------------------------------------------------------------------------------- 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. CUSIP No. 512815101 Page 12 of 25 pages -------------------------------------------------------------------------------- 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 USA -------------------------------------------------------------------------------- 7. SOLE VOTING POWER 1,156 (1) ------------------------------------------------------ NUMBER OF SHARES 8. SHARED VOTING POWER BENEFICIALLY OWNED -0- BY EACH REPORTING ------------------------------------------------------ PERSON WITH 9. SOLE DISPOSITIVE POWER 1,156 (1) ------------------------------------------------------ 10. SHARED DISPOSITIVE POWER -0- -------------------------------------------------------------------------------- 11. AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,156 -------------------------------------------------------------------------------- 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. (1) Of these shares, 256 shares are held in the Ian R. McGuire Individual Retirement Account, which is self-directed. Page 13 of 25 pages This Amendment No. 9 amends the Schedule 13D (the "Original 13D") filed with the Securities and Exchange Commission ("SEC") on August 22, 2005 and as amended on May 10, 2006, July 19, 2006, July 31, 2007, October 2, 2007, March 21, 2008, April 15, 2008, June 26, 2008 and July 1, 2008. Unless otherwise stated herein, the Original 13D, as previously amended, remains in full force and effect. Terms used therein and not defined herein shall have the meanings ascribed thereto in the Original 13D. 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 $668,512,914 SPO Advisory Partners Not Applicable Not Applicable SFP Contributions from Partners $30,762,451 SF Advisory Partners Not Applicable Not Applicable SPO Advisory Corp. Not Applicable Not Applicable JHS Not Applicable and Personal Funds $778,865 WEO Not Applicable and Personal Funds $1,333,503 WJP Not Applicable and Personal Funds $66,412 PS Foundation Contributions from Shareholders $15,077,638 Patterson Foundation Contributions from Shareholders $1,980,615 EJW Personal Funds $5,672 IRM Personal Funds $55,943 ITEM 5. INTEREST IN SECURITIES OF THE ISSUER. (a) Percentage interest calculations for each Reporting Person are based upon the Issuer having 76,991,663 total outstanding shares of Class A common stock as reported on the Issuer's 10-Q filed with the Securities and Exchange Commission on May 8, 2008. SPO The aggregate number of Shares that SPO owns beneficially, pursuant to Rule 13d-3 of the Act, is 15,918,384 Shares, which constitutes approximately 20.7% 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 15,918,384 Shares, which constitutes approximately 20.7% of the outstanding Shares. SFP The aggregate number of Shares that SFP owns beneficially, pursuant to Rule 13d-3 of the Act, is 735,730 Shares, which constitutes approximately 1.0% of the outstanding Shares. Page 14 of 25 pages SF Advisory Partners Because of its position as the sole general partner of SFP, SF Advisory Partners may, pursuant to Rule 13d-3 of the Act, be deemed to be the beneficial owner of 735,730 Shares, which constitutes approximately 1.0% of the outstanding Shares. SPO Advisory Corp. Because of its positions as the sole general partner of each of SPO Advisory Partners and SF Advisory Partners, SPO Advisory Corp. may, pursuant to Rule 13d-3 of the Act, be deemed to be the beneficial owner of 16,654,114 Shares in the aggregate, which constitutes approximately 21.6% of the outstanding Shares. JHS Individually, and because of his positions as a control person of SPO Advisory Corp. and controlling person, sole director and executive officer of PS Foundation, JHS may, pursuant to Rule 13d-3 of the Act, be deemed to be the beneficial owner of 16,957,414 Shares, which constitutes approximately 22.0% of the outstanding Shares. WEO Individually and because of his position as a control person of SPO Advisory Corp., WEO may, pursuant to Rule 13d-3 of the Act, be deemed to be the beneficial owner of 16,692,614 Shares, which constitutes approximately 21.7% of the outstanding Shares. WJP Individually and 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 16,706,614 Shares, which constitutes approximately 21.7% of the outstanding Shares. PS FOUNDATION The aggregate number of Shares that PS Foundation owns beneficially, pursuant to Rule 13d-3 of the Act, is 284,600 Shares, which constitutes approximately 0.4% of the outstanding Shares. Page 15 of 25 pages PATTERSON FOUNDATION The aggregate number of Shares that Patterson Foundation owns beneficially, pursuant to Rule 13d-3 of the Act, is 50,800 Shares, which constitutes approximately 0.1% of the outstanding Shares. EJW The aggregate number of Shares that EJW owns beneficially, pursuant to Rule 13d-3 of the Act, is 126 Shares, 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 1,156 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 15,918,384 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 15,918,384 Shares. SFP Acting through its sole general partner, SFP has the sole power to vote or to direct the vote and to dispose or to direct the disposition of 735,730 Shares. SF Advisory Partners Acting through its sole general partner and in its capacity as the sole general partner of SFP, SF Advisory Partners has the sole power to vote or to direct the vote and to dispose or to direct the disposition of 735,730 Shares. SPO Advisory Corp. Acting through its controlling persons and in its capacities as the sole general partner of each of SPO Advisory Partners and SF 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 16,654,114 Shares in the aggregate. Page 16 of 25 pages JHS As one of three controlling persons of SPO Advisory Corp., which is the sole general partner of each of SPO Advisory Partners and SF Advisory Partners, JHS may be deemed to have shared power with WEO and WJP to vote or to direct the vote and to dispose or to direct the disposition of 16,654,114 Shares held by SPO and SFP in the aggregate. In addition, JHS has the sole power to vote or to direct the vote and to dispose or to direct the disposition of 18,700 Shares held in the John H. Scully Individual Retirement Accounts, which are self-directed individual retirement accounts, and 284,600 Shares held by the PS Foundation, for which JHS is the controlling person, sole director and executive officer. WEO As one of three controlling persons of SPO Advisory Corp., which is the sole general partner of each of SPO Advisory Partners and SF Advisory Partners, WEO may be deemed to have shared power with JHS and WJP to vote or to direct the vote and to dispose or to direct the disposition of 16,654,114 Shares held by SPO and SFP in the aggregate. In addition, WEO has the sole power to vote or to direct the vote and to dispose or to direct the disposition of 38,500 shares held in the William E. Oberndorf Individual Retirement Account, which is a self- directed individual retirement account. WJP As one of the controlling persons of SPO Advisory Corp., which is the sole general partner of each of SPO Advisory Partners and SF Advisory Partners, WJP may be deemed to have shared power with JHS and WEO to vote or to direct the vote and to dispose or to direct the disposition of 16,654,114 Shares held by SPO and SFP in the aggregate. WJP may be deemed to have shared power to vote or to direct the vote and to dispose or to direct the disposition of 50,800 Shares held by the Patterson Foundation. In addition, WJP has the sole power to vote or to direct the vote and to dispose or to direct the disposition of 1,700 Shares held in the William J. Patterson Individual Retirement Account, which is a self-directed individual retirement account. PS FOUNDATION Acting through its controlling person, PS Foundation has the sole power to vote or to direct the vote and to dispose or to direct the disposition of 284,600 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 50,800 Shares. EJW EJW has the sole power to vote or to direct the vote and to dispose or to direct the disposition of 126 Shares. IRM IRM has the sole power to vote or to direct the vote and to dispose or to direct the disposition of 256 Shares held in the Ian R. McGuire Individual Retirement Account, which is a self-directed individual retirement account. In addition, IRM has the sole power to vote or to direct the vote and to dispose or to direct the disposition of 900 Shares. (c) Since the most recent filing on Schedule 13D, Reporting Persons purchased Shares in open market transactions on the Nasdaq Global Select Market as set forth on Schedule I attached hereto. Page 17 of 25 pages 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 since the most recent filing on Schedule 13D. (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) Exhibit B: Powers of Attorney (previously filed) Page 18 of 25 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 July 7, 2008 By: /s/ Kim M. Silva -------------------------------- Kim M. Silva Attorney-in-Fact for: SPO PARTNERS II, L.P.(1) SPO ADVISORY PARTNERS, L.P.(1) SAN FRANCISCO PARTNERS II, L.P.(1) SF ADVISORY PARTNERS, L.P.(1) SPO ADVISORY CORP.(1) JOHN H. SCULLY(1) WILLIAM E. OBERNDORF(1) WILLIAM J. PATTERSON(1) PHOEBE SNOW FOUNDATION, INC.(1) THE ELIZABETH R. & WILLIAM J. PATTERSON FOUNDATION(1) ELI J. WEINBERG(1) IAN R. McGUIRE(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 19 of 25 pages SCHEDULE I TO SCHEDULE 13D Reporting Person Date of Type Number of Price Per Where/How Transaction Shares Share ($) Transaction Effected -------------------------------------------------------------------------------------------------------------------------------- SPO Partners II, L.P. 07/01/08 Buy 198 34.5800 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 396 34.5900 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 12935 34.6000 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 29 34.6100 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 396 34.6200 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 198 34.6300 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 975 34.6400 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 31251 34.6500 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 1089 34.6600 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 8791 34.6700 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 1757 34.6800 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 2417 34.6900 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 36636 34.7000 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 2078 34.7100 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 1069 34.7200 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 891 34.7300 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 3760 34.7400 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 51781 34.7500 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 15042 34.7600 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 691 34.7700 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 200 34.7800 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 1188 34.7900 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 9493 34.8000 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 792 34.8100 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 14727 34.8200 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 792 34.8300 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 99 34.8400 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 1484 34.8500 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 317 34.8600 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 990 34.8700 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 3008 34.8800 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 1878 34.8900 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 6037 34.9000 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 2969 34.9100 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 1426 34.9200 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 8569 34.9300 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 4453 34.9400 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 8544 34.9500 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 1841 34.9600 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 6037 34.9700 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 14359 34.9800 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 5344 34.9900 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 18331 35.0000 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 13128 35.0100 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 10144 35.0200 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 6346 35.0300 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 2671 35.0400 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 3736 35.0500 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 1401 35.0600 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 3167 35.0700 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 2359 35.0800 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 9995 35.0900 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 18901 35.1000 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 5940 35.1100 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 10193 35.1200 Open Market/Broker Page 20 of 25 pages SCHEDULE I TO SCHEDULE 13D Reporting Person Date of Type Number of Price Per Where/How Transaction Shares Share ($) Transaction Effected -------------------------------------------------------------------------------------------------------------------------------- SPO Partners II, L.P. 07/01/08 Buy 21185 35.1300 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 4615 35.1400 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 18559 35.1500 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 8906 35.1600 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 5586 35.1700 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 3187 35.1800 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 18584 35.1900 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 14232 35.2000 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 9764 35.2100 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 15959 35.2200 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 8349 35.2300 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 6632 35.2400 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 6393 35.2500 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 5686 35.2600 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 2187 35.2700 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 4651 35.2800 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 2700 35.2900 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 1880 35.3000 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 6160 35.3100 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 3464 35.3200 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 2771 35.3300 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 2276 35.3400 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 1880 35.3500 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 2792 35.3600 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 2573 35.3700 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 2078 35.3800 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 2771 35.3900 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 2177 35.4000 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 3859 35.4100 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 2736 35.4200 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 1940 35.4300 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 3457 35.4400 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 2838 35.4500 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 1682 35.4600 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 6531 35.4700 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 6136 35.4800 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 4057 35.4900 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 20662 35.5000 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 99 35.5200 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 396 35.5300 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 396 35.5400 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 495 35.5600 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 99 35.5800 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 297 35.6200 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 99 35.6300 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 99 35.6400 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 297 35.6500 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 891 35.6600 Open Market/Broker SPO Partners II, L.P. 07/01/08 Buy 198 35.6700 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 2 34.5800 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 4 34.5900 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 136 34.6000 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 4 34.6200 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 2 34.6300 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 10 34.6400 Open Market/Broker Page 21 of 25 pages SCHEDULE I TO SCHEDULE 13D Reporting Person Date of Type Number of Price Per Where/How Transaction Shares Share ($) Transaction Effected -------------------------------------------------------------------------------------------------------------------------------- William E. Oberndorf IRA 07/01/08 Buy 328 34.6500 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 11 34.6600 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 92 34.6700 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 18 34.6800 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 25 34.6900 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 385 34.7000 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 22 34.7100 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 11 34.7200 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 9 34.7300 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 40 34.7400 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 544 34.7500 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 158 34.7600 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 7 34.7700 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 2 34.7800 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 12 34.7900 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 100 34.8000 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 8 34.8100 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 155 34.8200 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 8 34.8300 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 1 34.8400 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 16 34.8500 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 3 34.8600 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 10 34.8700 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 32 34.8800 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 20 34.8900 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 63 34.9000 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 31 34.9100 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 15 34.9200 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 90 34.9300 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 47 34.9400 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 90 34.9500 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 19 34.9600 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 63 34.9700 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 151 34.9800 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 56 34.9900 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 193 35.0000 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 138 35.0100 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 108 35.0200 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 68 35.0300 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 29 35.0400 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 39 35.0500 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 15 35.0600 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 33 35.0700 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 25 35.0800 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 105 35.0900 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 199 35.1000 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 62 35.1100 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 107 35.1200 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 223 35.1300 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 49 35.1400 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 195 35.1500 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 94 35.1600 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 59 35.1700 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 33 35.1800 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 195 35.1900 Open Market/Broker Page 22 of 25 pages SCHEDULE I TO SCHEDULE 13D Reporting Person Date of Type Number of Price Per Where/How Transaction Shares Share ($) Transaction Effected -------------------------------------------------------------------------------------------------------------------------------- William E. Oberndorf IRA 07/01/08 Buy 150 35.2000 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 103 35.2100 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 168 35.2200 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 88 35.2300 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 70 35.2400 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 67 35.2500 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 60 35.2600 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 23 35.2700 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 49 35.2800 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 28 35.2900 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 20 35.3000 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 65 35.3100 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 36 35.3200 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 29 35.3300 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 24 35.3400 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 20 35.3500 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 29 35.3600 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 27 35.3700 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 22 35.3800 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 29 35.3900 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 23 35.4000 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 41 35.4100 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 29 35.4200 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 20 35.4300 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 36 35.4400 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 30 35.4500 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 18 35.4600 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 69 35.4700 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 64 35.4800 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 43 35.4900 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 217 35.5000 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 1 35.5200 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 4 35.5300 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 4 35.5400 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 5 35.5600 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 1 35.5800 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 3 35.6200 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 1 35.6300 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 1 35.6400 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 3 35.6500 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 9 35.6600 Open Market/Broker William E. Oberndorf IRA 07/01/08 Buy 2 35.6700 Open Market/Broker SPO Partners II, L.P. 07/02/08 Buy 5815 35.0900 Open Market/Broker SPO Partners II, L.P. 07/02/08 Buy 1112 35.1100 Open Market/Broker SPO Partners II, L.P. 07/02/08 Buy 1188 35.1200 Open Market/Broker SPO Partners II, L.P. 07/02/08 Buy 9301 35.1300 Open Market/Broker SPO Partners II, L.P. 07/02/08 Buy 4356 35.1500 Open Market/Broker SPO Partners II, L.P. 07/02/08 Buy 582 35.1600 Open Market/Broker SPO Partners II, L.P. 07/02/08 Buy 29590 35.1700 Open Market/Broker SPO Partners II, L.P. 07/02/08 Buy 5295 35.1800 Open Market/Broker SPO Partners II, L.P. 07/02/08 Buy 9896 35.2300 Open Market/Broker SPO Partners II, L.P. 07/02/08 Buy 11529 35.2400 Open Market/Broker SPO Partners II, L.P. 07/02/08 Buy 18803 35.2600 Open Market/Broker SPO Partners II, L.P. 07/02/08 Buy 2078 35.2700 Open Market/Broker Page 23 of 25 pages SCHEDULE I TO SCHEDULE 13D Reporting Person Date of Type Number of Price Per Where/How Transaction Shares Share ($) Transaction Effected -------------------------------------------------------------------------------------------------------------------------------- SPO Partners II, L.P. 07/02/08 Buy 495 35.2800 Open Market/Broker SPO Partners II, L.P. 07/02/08 Buy 6487 35.2900 Open Market/Broker SPO Partners II, L.P. 07/02/08 Buy 8654 35.3000 Open Market/Broker SPO Partners II, L.P. 07/02/08 Buy 9600 35.3200 Open Market/Broker SPO Partners II, L.P. 07/02/08 Buy 297 35.3400 Open Market/Broker SPO Partners II, L.P. 07/02/08 Buy 9995 35.3700 Open Market/Broker SPO Partners II, L.P. 07/02/08 Buy 10007 35.3800 Open Market/Broker SPO Partners II, L.P. 07/02/08 Buy 495 35.3900 Open Market/Broker SPO Partners II, L.P. 07/02/08 Buy 19793 35.4000 Open Market/Broker SPO Partners II, L.P. 07/02/08 Buy 13855 35.4200 Open Market/Broker SPO Partners II, L.P. 07/02/08 Buy 49482 35.4300 Open Market/Broker SPO Partners II, L.P. 07/02/08 Buy 5845 35.4400 Open Market/Broker SPO Partners II, L.P. 07/02/08 Buy 4606 35.4500 Open Market/Broker SPO Partners II, L.P. 07/02/08 Buy 13139 35.4600 Open Market/Broker SPO Partners II, L.P. 07/02/08 Buy 22960 35.4700 Open Market/Broker SPO Partners II, L.P. 07/02/08 Buy 9792 35.4800 Open Market/Broker SPO Partners II, L.P. 07/02/08 Buy 20982 35.5000 Open Market/Broker SPO Partners II, L.P. 07/02/08 Buy 21376 35.5200 Open Market/Broker SPO Partners II, L.P. 07/02/08 Buy 9896 35.5300 Open Market/Broker SPO Partners II, L.P. 07/02/08 Buy 6400 35.5500 Open Market/Broker SPO Partners II, L.P. 07/02/08 Buy 23356 35.5600 Open Market/Broker SPO Partners II, L.P. 07/02/08 Buy 6936 35.5700 Open Market/Broker SPO Partners II, L.P. 07/02/08 Buy 2960 35.5800 Open Market/Broker SPO Partners II, L.P. 07/02/08 Buy 6928 35.5900 Open Market/Broker SPO Partners II, L.P. 07/02/08 Buy 495 35.6000 Open Market/Broker SPO Partners II, L.P. 07/02/08 Buy 13459 35.6100 Open Market/Broker SPO Partners II, L.P. 07/02/08 Buy 508 35.6300 Open Market/Broker SPO Partners II, L.P. 07/02/08 Buy 6532 35.6400 Open Market/Broker SPO Partners II, L.P. 07/02/08 Buy 396 35.6500 Open Market/Broker SPO Partners II, L.P. 07/02/08 Buy 6334 35.6700 Open Market/Broker SPO Partners II, L.P. 07/02/08 Buy 99 35.6800 Open Market/Broker SPO Partners II, L.P. 07/02/08 Buy 7026 35.6900 Open Market/Broker SPO Partners II, L.P. 07/02/08 Buy 11497 35.7000 Open Market/Broker SPO Partners II, L.P. 07/02/08 Buy 2758 35.7300 Open Market/Broker SPO Partners II, L.P. 07/02/08 Buy 10078 35.7600 Open Market/Broker SPO Partners II, L.P. 07/02/08 Buy 17 35.7700 Open Market/Broker SPO Partners II, L.P. 07/02/08 Buy 6020 35.7800 Open Market/Broker William E. Oberndorf IRA 07/02/08 Buy 61 35.0900 Open Market/Broker William E. Oberndorf IRA 07/02/08 Buy 12 35.1100 Open Market/Broker William E. Oberndorf IRA 07/02/08 Buy 12 35.1200 Open Market/Broker William E. Oberndorf IRA 07/02/08 Buy 97 35.1300 Open Market/Broker William E. Oberndorf IRA 07/02/08 Buy 46 35.1500 Open Market/Broker William E. Oberndorf IRA 07/02/08 Buy 6 35.1600 Open Market/Broker William E. Oberndorf IRA 07/02/08 Buy 310 35.1700 Open Market/Broker William E. Oberndorf IRA 07/02/08 Buy 55 35.1800 Open Market/Broker William E. Oberndorf IRA 07/02/08 Buy 104 35.2300 Open Market/Broker William E. Oberndorf IRA 07/02/08 Buy 121 35.2400 Open Market/Broker William E. Oberndorf IRA 07/02/08 Buy 197 35.2600 Open Market/Broker William E. Oberndorf IRA 07/02/08 Buy 22 35.2700 Open Market/Broker William E. Oberndorf IRA 07/02/08 Buy 5 35.2800 Open Market/Broker William E. Oberndorf IRA 07/02/08 Buy 68 35.2900 Open Market/Broker William E. Oberndorf IRA 07/02/08 Buy 91 35.3000 Open Market/Broker William E. Oberndorf IRA 07/02/08 Buy 100 35.3200 Open Market/Broker William E. Oberndorf IRA 07/02/08 Buy 3 35.3400 Open Market/Broker William E. Oberndorf IRA 07/02/08 Buy 105 35.3700 Open Market/Broker Page 24 of 25 pages SCHEDULE I TO SCHEDULE 13D Reporting Person Date of Type Number of Price Per Where/How Transaction Shares Share ($) Transaction Effected -------------------------------------------------------------------------------------------------------------------------------- William E. Oberndorf IRA 07/02/08 Buy 105 35.3800 Open Market/Broker William E. Oberndorf IRA 07/02/08 Buy 5 35.3900 Open Market/Broker William E. Oberndorf IRA 07/02/08 Buy 207 35.4000 Open Market/Broker William E. Oberndorf IRA 07/02/08 Buy 145 35.4200 Open Market/Broker William E. Oberndorf IRA 07/02/08 Buy 518 35.4300 Open Market/Broker William E. Oberndorf IRA 07/02/08 Buy 61 35.4400 Open Market/Broker William E. Oberndorf IRA 07/02/08 Buy 48 35.4500 Open Market/Broker William E. Oberndorf IRA 07/02/08 Buy 138 35.4600 Open Market/Broker William E. Oberndorf IRA 07/02/08 Buy 240 35.4700 Open Market/Broker William E. Oberndorf IRA 07/02/08 Buy 102 35.4800 Open Market/Broker William E. Oberndorf IRA 07/02/08 Buy 220 35.5000 Open Market/Broker William E. Oberndorf IRA 07/02/08 Buy 224 35.5200 Open Market/Broker William E. Oberndorf IRA 07/02/08 Buy 104 35.5300 Open Market/Broker William E. Oberndorf IRA 07/02/08 Buy 67 35.5500 Open Market/Broker William E. Oberndorf IRA 07/02/08 Buy 244 35.5600 Open Market/Broker William E. Oberndorf IRA 07/02/08 Buy 73 35.5700 Open Market/Broker William E. Oberndorf IRA 07/02/08 Buy 31 35.5800 Open Market/Broker William E. Oberndorf IRA 07/02/08 Buy 72 35.5900 Open Market/Broker William E. Oberndorf IRA 07/02/08 Buy 5 35.6000 Open Market/Broker William E. Oberndorf IRA 07/02/08 Buy 141 35.6100 Open Market/Broker William E. Oberndorf IRA 07/02/08 Buy 5 35.6300 Open Market/Broker William E. Oberndorf IRA 07/02/08 Buy 68 35.6400 Open Market/Broker William E. Oberndorf IRA 07/02/08 Buy 4 35.6500 Open Market/Broker William E. Oberndorf IRA 07/02/08 Buy 66 35.6700 Open Market/Broker William E. Oberndorf IRA 07/02/08 Buy 1 35.6800 Open Market/Broker William E. Oberndorf IRA 07/02/08 Buy 74 35.6900 Open Market/Broker William E. Oberndorf IRA 07/02/08 Buy 120 35.7000 Open Market/Broker William E. Oberndorf IRA 07/02/08 Buy 29 35.7300 Open Market/Broker William E. Oberndorf IRA 07/02/08 Buy 105 35.7600 Open Market/Broker William E. Oberndorf IRA 07/02/08 Buy 63 35.7800 Open Market/Broker SPO Partners II, L.P. 07/03/08 Buy 990 35.4000 Open Market/Broker SPO Partners II, L.P. 07/03/08 Buy 2375 35.4400 Open Market/Broker SPO Partners II, L.P. 07/03/08 Buy 3266 35.4500 Open Market/Broker SPO Partners II, L.P. 07/03/08 Buy 148 35.4900 Open Market/Broker SPO Partners II, L.P. 07/03/08 Buy 20786 35.5000 Open Market/Broker SPO Partners II, L.P. 07/03/08 Buy 459 35.5100 Open Market/Broker SPO Partners II, L.P. 07/03/08 Buy 297 35.5200 Open Market/Broker SPO Partners II, L.P. 07/03/08 Buy 495 35.5300 Open Market/Broker SPO Partners II, L.P. 07/03/08 Buy 693 35.5400 Open Market/Broker SPO Partners II, L.P. 07/03/08 Buy 28591 35.5500 Open Market/Broker William E. Oberndorf IRA 07/03/08 Buy 10 35.4000 Open Market/Broker William E. Oberndorf IRA 07/03/08 Buy 25 35.4400 Open Market/Broker William E. Oberndorf IRA 07/03/08 Buy 34 35.4500 Open Market/Broker William E. Oberndorf IRA 07/03/08 Buy 2 35.4900 Open Market/Broker William E. Oberndorf IRA 07/03/08 Buy 215 35.5000 Open Market/Broker William E. Oberndorf IRA 07/03/08 Buy 5 35.5100 Open Market/Broker William E. Oberndorf IRA 07/03/08 Buy 3 35.5200 Open Market/Broker William E. Oberndorf IRA 07/03/08 Buy 5 35.5300 Open Market/Broker William E. Oberndorf IRA 07/03/08 Buy 7 35.5400 Open Market/Broker William E. Oberndorf IRA 07/03/08 Buy 294 35.5500 Open Market/Broker Page 25 of 25 pages EXHIBIT INDEX EXHIBIT DOCUMENT DESCRIPTION ------- -------------------- A Agreement Pursuant to Rule 13d-1 (k) B Powers of Attorney (previously filed)