SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                  SCHEDULE 13D

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

                            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)

                               September 18, 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 22 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
                              17,902,984 (1)
                          ------------------------------------------------------
  NUMBER OF SHARES        8.  SHARED VOTING POWER
 BENEFICIALLY OWNED           -0-
 BY EACH REPORTING        ------------------------------------------------------
     PERSON WITH          9.  SOLE DISPOSITIVE POWER
                              17,902,984 (1)
                          ------------------------------------------------------
                          10. SHARED DISPOSITIVE POWER
                              -0-
--------------------------------------------------------------------------------
11.      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
         17,902,984
--------------------------------------------------------------------------------
12.      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN
         SHARES [_]
--------------------------------------------------------------------------------
13.      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
         23.6%
--------------------------------------------------------------------------------
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 22 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
                                 17,902,984 (1)(2)
                          ------------------------------------------------------
  NUMBER OF SHARES        8.     SHARED VOTING POWER
 BENEFICIALLY OWNED              -0-
 BY EACH REPORTING        ------------------------------------------------------
     PERSON WITH          9.     SOLE DISPOSITIVE POWER
                                 17,902,984 (1)(2)
                          ------------------------------------------------------
                          10.    SHARED DISPOSITIVE POWER
                                 -0-
--------------------------------------------------------------------------------
11.      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
         17,902,984
--------------------------------------------------------------------------------
12.      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN
         SHARES [_]
--------------------------------------------------------------------------------
13.      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
         23.6%
--------------------------------------------------------------------------------
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 22 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 22 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 22 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
                                 18,638,714 (1)(2)
                          ------------------------------------------------------
  NUMBER OF SHARES        8.     SHARED VOTING POWER
 BENEFICIALLY OWNED              -0-
 BY EACH REPORTING        ------------------------------------------------------
     PERSON WITH          9.     SOLE DISPOSITIVE POWER
                                 18,638,714 (1)(2)
                          ------------------------------------------------------
                          10.    SHARED DISPOSITIVE POWER
                                 -0-
--------------------------------------------------------------------------------
11.      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
         18,638,714
--------------------------------------------------------------------------------
12.      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN
         SHARES [_]
--------------------------------------------------------------------------------
13.      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
         24.5%
--------------------------------------------------------------------------------
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 17,902,984 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 four controlling persons, John H. Scully,
    William E. Oberndorf, William J. Patterson and Edward H. McDermott.



CUSIP No. 512815101                                           Page 6 of 22 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              18,638,714 (2)
 BY EACH REPORTING        ------------------------------------------------------
     PERSON WITH          9.     SOLE DISPOSITIVE POWER
                                 303,300 (1)
                          ------------------------------------------------------
                          10.    SHARED DISPOSITIVE POWER
                                 18,638,714 (2)
--------------------------------------------------------------------------------
11.      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
         18,942,014
--------------------------------------------------------------------------------
12.      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN
         SHARES [_]
--------------------------------------------------------------------------------
13.      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
         24.9%
--------------------------------------------------------------------------------
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 four controlling persons of SPO Advisory Corp.



CUSIP No. 512815101                                           Page 7 of 22 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
                                 84,600 (1)
                          ------------------------------------------------------
  NUMBER OF SHARES        8.     SHARED VOTING POWER
 BENEFICIALLY OWNED              18,638,714 (2)
 BY EACH REPORTING        ------------------------------------------------------
     PERSON WITH          9.     SOLE DISPOSITIVE POWER
                                 84,600 (1)
                          ------------------------------------------------------
                          10.    SHARED DISPOSITIVE POWER
                                 18,638,714 (2)
--------------------------------------------------------------------------------
11.      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
         18,723,314
--------------------------------------------------------------------------------
12.      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN
         SHARES [_]
--------------------------------------------------------------------------------
13.      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
         24.6%
--------------------------------------------------------------------------------
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 four controlling persons of SPO Advisory Corp.



CUSIP No. 512815101                                           Page 8 of 22 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              18,689,914 (2)
 BY EACH REPORTING        ------------------------------------------------------
     PERSON WITH          9.     SOLE DISPOSITIVE POWER
                                 1,700 (1)
                          ------------------------------------------------------
                          10.    SHARED DISPOSITIVE POWER
                                 18,689,914 (2)
--------------------------------------------------------------------------------
11.      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
         18,691,614
--------------------------------------------------------------------------------
12.      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN
         SHARES [_]
--------------------------------------------------------------------------------
13.      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
         24.6%
--------------------------------------------------------------------------------
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, 18,638,714 shares may be deemed to be beneficially owned by
    Mr. Patterson solely in his capacity as one of four controlling persons of
    SPO Advisory Corp. and 51,200 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 22 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 22 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
                                 51,200 (1)
                          ------------------------------------------------------
  NUMBER OF SHARES        8.     SHARED VOTING POWER
 BENEFICIALLY OWNED              -0-
 BY EACH REPORTING        ------------------------------------------------------
     PERSON WITH          9.     SOLE DISPOSITIVE POWER
                                 51,200 (1)
                          ------------------------------------------------------
                          10.    SHARED DISPOSITIVE POWER
                                 -0-
--------------------------------------------------------------------------------
11.      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
         51,200
--------------------------------------------------------------------------------
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 22 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 22 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.



CUSIP No. 512815101                                          Page 13 of 22 pages

--------------------------------------------------------------------------------
1.       NAME OF REPORTING PERSON
         Edward H. McDermott
--------------------------------------------------------------------------------
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
                                 1357 (1)
                          ------------------------------------------------------
  NUMBER OF SHARES        8.     SHARED VOTING POWER
 BENEFICIALLY OWNED              18,638,714 (2)
 BY EACH REPORTING        ------------------------------------------------------
     PERSON WITH          9.     SOLE DISPOSITIVE POWER
                                 1357 (1)
                          ------------------------------------------------------
                          10.    SHARED DISPOSITIVE POWER
                                 18,638,714 (2)
--------------------------------------------------------------------------------
11.      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
         18,640,071
--------------------------------------------------------------------------------
12.      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN
         SHARES [_]
--------------------------------------------------------------------------------
13.      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
         24.5%
--------------------------------------------------------------------------------
14.      TYPE OF REPORTING PERSON
         IN
--------------------------------------------------------------------------------

(1)  Of these, 800 shares are held in the Edward H. McDermott Individual
     Retirement Account, which is self-directed, and 557 shares are restricted
     stock awarded to Mr. McDermott in his capacity as a member of the board of
     directors of the issuer.

(2)  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 14 of 22 pages

         This Amendment No. 11 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, July 1, 2008, July 7, 2008 and July 15,
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 2. IDENTITY AND BACKGROUND.

         The following subsections of Item 2(b)-(c) are hereby amended and
restated in their entirety as follows:

         JHS

         JHS's business address is 591 Redwood Highway, Suite 3215, Mill Valley,
California 94941. His present principal occupation is serving as a managing
director of SPO Partners & Co., a Delaware corporation. The principal business
of SPO Partners & Co. is operating as an investment firm. The principal business
address of SPO Partners & Co., which serves as its principal office, is 591
Redwood Highway, Suite 3215, Mill Valley, California 94941. JHS is one of four
controlling persons of SPO Advisory Corp., the sole general partner of each of
SPO Advisory Partners and SF Advisory Partners.

         WEO

         WEO's business address is 591 Redwood Highway, Suite 3215, Mill Valley,
California 94941. His present principal occupation is serving as a managing
director of SPO Partners & Co., a Delaware corporation. The principal business
of SPO Partners & Co. is operating as an investment firm. The principal business
address of SPO Partners & Co., which serves as its principal office, is 591
Redwood Highway, Suite 3215, Mill Valley, California 94941. WEO is one of four
controlling persons of SPO Advisory Corp., the sole general partner of each of
SPO Advisory Partners and SF Advisory Partners.

         WJP

         WJP's business address is 591 Redwood Highway, Suite 3215, Mill Valley,
California 94941. His present principal occupation is serving as a managing
director of SPO Partners & Co., a Delaware corporation. The principal business
of SPO Partners & Co. is operating as an investment firm. The principal business
address of SPO Partners & Co., which serves as its principal office, is 591
Redwood Highway, Suite 3215, Mill Valley, California 94941. WJP is one of four
controlling persons of SPO Advisory Corp., the sole general partner of each of
SPO Advisory Partners and SF Advisory Partners.

         EHM

         EHM's business address is 591 Redwood Highway, Suite 3215, Mill Valley,
California 94941. His present principal occupation is serving as a managing
director of SPO Partners & Co., a Delaware corporation. The principal business
of SPO Partners & Co. is operating as an investment firm. The principal business
address of SPO Partners & Co., which serves as its principal office, is 591
Redwood Highway, Suite 3215, Mill Valley, California 94941. EHM is one of four
controlling persons of SPO Advisory Corp., the sole general partner of each of
SPO Advisory Partners and SF Advisory Partners.


                                                             Page 15 of 22 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           $734,134,107
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     $2,857,755
WJP                            Not Applicable and Personal Funds     $66,412
PS Foundation                  Contributions from Shareholders       $15,077,638
Patterson Foundation           Contributions from Shareholders       $1,994,537
EJW                            Personal Funds                        $5,672
IRM                            Personal Funds                        $55,943
EHM                            Not Applicable and Personal Funds     $26,280


ITEM 5.  INTEREST IN SECURITIES OF THE ISSUER.

         (a) Percentage interest calculations for each Reporting Person are
based upon the Issuer having 75,977,891 total outstanding shares of Class A
common stock as reported on the Issuer's 10-Q filed with the Securities and
Exchange Commission on August 8, 2008.

         SPO

         The aggregate number of Shares that SPO owns beneficially, pursuant to
Rule 13d-3 of the Act, is 17,902,984 Shares, which constitutes approximately
23.6% 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 17,902,984 Shares, which constitutes approximately 23.6% 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 16 of 22 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 18,638,714 Shares
in the aggregate, which constitutes approximately 24.5% 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 18,942,014 Shares, which constitutes approximately 24.9% 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 18,723,314 Shares, which constitutes approximately 24.6% 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 18,691,614 Shares, which constitutes approximately
24.6% 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 17 of 22 pages

         PATTERSON FOUNDATION

         The aggregate number of Shares that Patterson Foundation owns
beneficially, pursuant to Rule 13d-3 of the Act, is 51,200 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.

         EHM

         Individually and 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 18,640,071 Shares, which constitutes approximately 24.5% 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 17,902,984
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 17,902,984
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 18,638,714 Shares in the aggregate.


                                                             Page 18 of 22 pages

         JHS

         As one of four 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, WJP and EHM to vote or to
direct the vote and to dispose or to direct the disposition of 18,638,714 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 four 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, WJP and EHM to vote or to
direct the vote and to dispose or to direct the disposition of 18,638,714 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 84,600
shares held in the William E. Oberndorf Individual Retirement Account, which is
a self- directed individual retirement account.

         WJP

         As one of four 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, WEO and EHM to vote or to
direct the vote and to dispose or to direct the disposition of 18,638,714 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 51,200
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 51,200 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.


                                                             Page 19 of 22 pages

         EHM

         As one of four controlling persons of SPO Advisory Corp., which is the
sole general partner of each of SPO Advisory Partners and SF 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 18,638,714 Shares
held by SPO and SFP in the aggregate. In addition, EHM has the sole power to
vote or to direct the vote and to dispose or to direct the disposition of 800
Shares held in the Edward H. McDermott Individual Retirement Account, which is a
self-directed individual retirement account and 557 shares of restricted stock
awarded to EHM in his capacity as a director of the Issuer.

         (c) During the past 60 days, Reporting Persons purchased Shares in open
market transactions on the Nasdaq Global Select Market 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 6.  CONTRACTS, ARRANGEMENTS, UNDERSTANDINGS OR
         RELATIONSHIPS WITH RESPECT TO SECURITIES OF THE ISSUER.

         Item 6 is hereby amended and restated in its entirety as follows:

         Effective as of September 18, 2008, EHM has been appointed as a member
of the Board of Directors of the Issuer.

         Otherwise, except as set forth herein, there are no contracts,
arrangements, understandings or relationships of the type required to be
disclosed in response to Item 6 of Schedule 13D of the Act with respect to the
Shares owned by the Reporting Persons.

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 20 of 22 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 September 19, 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)
                                           EDWARD H. MCDERMOTT(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 21 of 22 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.                            07/21/2008      Buy      780          34.0900        Open Market/Broker
SPO Partners II, L.P.                            07/21/2008      Buy      195          34.1000        Open Market/Broker
SPO Partners II, L.P.                            07/21/2008      Buy      780          34.1100        Open Market/Broker
SPO Partners II, L.P.                            07/21/2008      Buy      585          34.1200        Open Market/Broker
SPO Partners II, L.P.                            07/21/2008      Buy      780          34.1300        Open Market/Broker
SPO Partners II, L.P.                            07/21/2008      Buy      1,154        34.1400        Open Market/Broker
SPO Partners II, L.P.                            07/21/2008      Buy      390          34.1600        Open Market/Broker
SPO Partners II, L.P.                            07/21/2008      Buy      976          34.1700        Open Market/Broker
SPO Partners II, L.P.                            07/21/2008      Buy      976          34.1800        Open Market/Broker
SPO Partners II, L.P.                            07/21/2008      Buy      780          34.1900        Open Market/Broker
SPO Partners II, L.P.                            07/21/2008      Buy      3,041        34.2000        Open Market/Broker
SPO Partners II, L.P.                            07/21/2008      Buy      1,366        34.2100        Open Market/Broker
SPO Partners II, L.P.                            07/21/2008      Buy      683          34.2200        Open Market/Broker
SPO Partners II, L.P.                            07/21/2008      Buy      1,463        34.2400        Open Market/Broker
SPO Partners II, L.P.                            07/21/2008      Buy      6,051        34.2500        Open Market/Broker
William E. Oberndorf IRA                         07/21/2008      Buy      20           34.0900        Open Market/Broker
William E. Oberndorf IRA                         07/21/2008      Buy      5            34.1000        Open Market/Broker
William E. Oberndorf IRA                         07/21/2008      Buy      20           34.1100        Open Market/Broker
William E. Oberndorf IRA                         07/21/2008      Buy      15           34.1200        Open Market/Broker
William E. Oberndorf IRA                         07/21/2008      Buy      20           34.1300        Open Market/Broker
William E. Oberndorf IRA                         07/21/2008      Buy      29           34.1400        Open Market/Broker
William E. Oberndorf IRA                         07/21/2008      Buy      10           34.1600        Open Market/Broker
William E. Oberndorf IRA                         07/21/2008      Buy      24           34.1700        Open Market/Broker
William E. Oberndorf IRA                         07/21/2008      Buy      24           34.1800        Open Market/Broker
William E. Oberndorf IRA                         07/21/2008      Buy      20           34.1900        Open Market/Broker
William E. Oberndorf IRA                         07/21/2008      Buy      76           34.2000        Open Market/Broker
William E. Oberndorf IRA                         07/21/2008      Buy      34           34.2100        Open Market/Broker
William E. Oberndorf IRA                         07/21/2008      Buy      17           34.2200        Open Market/Broker
William E. Oberndorf IRA                         07/21/2008      Buy      37           34.2400        Open Market/Broker
William E. Oberndorf IRA                         07/21/2008      Buy      149          34.2500        Open Market/Broker





                                                             Page 22 of 22 pages

                                  EXHIBIT INDEX

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