-----BEGIN PRIVACY-ENHANCED MESSAGE----- Proc-Type: 2001,MIC-CLEAR Originator-Name: webmaster@www.sec.gov Originator-Key-Asymmetric: MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB MIC-Info: RSA-MD5,RSA, JOk4dh12lC0CPePDoBK4FDJhVrWsQWERH6w8a5LCGoYwkfYOwveGBhzs44OtQSiv Zs6KiS6tPidJVDpmn55XWQ== 0001140361-07-018533.txt : 20070924 0001140361-07-018533.hdr.sgml : 20070924 20070921195936 ACCESSION NUMBER: 0001140361-07-018533 CONFORMED SUBMISSION TYPE: SC 13D PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20070924 DATE AS OF CHANGE: 20070921 GROUP MEMBERS: ANNE DARDEN SELF GROUP MEMBERS: GLENN DARDEN GROUP MEMBERS: MERCURY EXPLORATION COMPANY GROUP MEMBERS: MERCURY PRODUCTION COMPANY GROUP MEMBERS: PENNSYLVANIA MANANGEMENT, LLC GROUP MEMBERS: QUICKSILVER ENERGY LC GROUP MEMBERS: THOMAS F. DARDEN SUBJECT COMPANY: COMPANY DATA: COMPANY CONFORMED NAME: QUICKSILVER RESOURCES INC CENTRAL INDEX KEY: 0001060990 STANDARD INDUSTRIAL CLASSIFICATION: CRUDE PETROLEUM & NATURAL GAS [1311] IRS NUMBER: 752756163 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: SC 13D SEC ACT: 1934 Act SEC FILE NUMBER: 005-55999 FILM NUMBER: 071130351 BUSINESS ADDRESS: STREET 1: 777 WEST ROSEDALE STREET CITY: FORT WORTH STATE: TX ZIP: 76104 BUSINESS PHONE: 8176655000 MAIL ADDRESS: STREET 1: 777 WEST ROSEDALE STREET CITY: FORT WORTH STATE: TX ZIP: 76104 FILED BY: COMPANY DATA: COMPANY CONFORMED NAME: QUICKSILVER ENERGY LP CENTRAL INDEX KEY: 0001279442 IRS NUMBER: 752674134 STATE OF INCORPORATION: TX FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: SC 13D BUSINESS ADDRESS: STREET 1: 777 WEST ROSEDALE STREET STREET 2: SUITE 300 CITY: FORT WORTH STATE: TX ZIP: 76104 BUSINESS PHONE: 8176655000 MAIL ADDRESS: STREET 1: 777 WEST ROSEDALE STREET STREET 2: SUITE 300 CITY: FORT WORTH STATE: TX ZIP: 76104 SC 13D 1 formsc13d.htm QUICKSILVER RESOURCES SC 13D 10-6-2007 formsc13d.htm


   
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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C.  20549


SCHEDULE 13D
Under the Securities Exchange Act of 1934
(Amendment No. 2) *1

Quicksilver Resources Inc.

(Name of Issuer)


Common Stock

(Title of Class or Securities)

74837R-10-4

(CUSIP Number)

Anne Darden Self
777 West Rosedale Street
Fort Worth, Texas 76014
(817) 665-5000

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

October 6, 2006

(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 §§240.13d-1(e), 240.13d-1(f) or 240.13d-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 §240.13d-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).


Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.


 1 This statement on Schedule 13D is an initial filing by each of Mercury Production Company, Quicksilver Energy, L.P. and Pennsylvania Management, LLC. It further amends and restates in its entirety: (i) a statement on Schedule 13D filed by Quicksilver Energy, L.C. on March 12, 1999; (ii) statements on Schedule 13D filed by Mercury Exploration Company and Anne Darden Self on March 12, 1999, as each such statement was amended by an Amendment No. 1 filed on January 21, 2000; and (iii) statements on Schedule 13D filed by Glenn Darden and Thomas F. Darden on March 16, 1999, as each such statement was amended by an Amendment No.1 filed on January 21, 2000.
 



1


SEC 1743(3-06)
CUSIP No 74837R-10-4

1.
NAMES OF REPORTING PERSONS
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
Mercury Exploration Company
2.
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)
(a) o  
(b) x  
3.
SEC USE ONLY
4.
SOURCE OF FUNDS (SEE INSTRUCTIONS)
OO and WC
5.
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)
o  
6.
CITIZENSHIP OR PLACE OF ORGANIZATION
Texas
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON WITH           
7.
SOLE VOTING POWER
0
8.
SHARED VOTING POWER
0
9.
SOLE DISPOSITIVE POWER
0
10.
SHARED DISPOSITIVE POWER
0
11.
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
0
12.
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)
o  
13.
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
0%
14.
TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
CO

2

 
CUSIP No 74837R-10-4

1.
NAMES OF REPORTING PERSONS
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
Mercury Production Company
2.
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)
(a) o  
(b) x  
3.
SEC USE ONLY
4.
SOURCE OF FUNDS (SEE INSTRUCTIONS)
OO and WC
5.
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)
o  
6.
CITIZENSHIP OR PLACE OF ORGANIZATION
Texas
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON WITH         
7.
SOLE VOTING POWER
0
8.
SHARED VOTING POWER
0
9.
SOLE DISPOSITIVE POWER
0
10.
SHARED DISPOSITIVE POWER
0
11.
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
0
12.
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)
o  
13.
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
0%
14.
TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
CO
3

 
CUSIP No 74837R-10-4

1.
NAMES OF REPORTING PERSONS
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
Quicksilver Energy, L.C.
2.
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)
(a) o  
(b) x  
3.
SEC USE ONLY
4.
SOURCE OF FUNDS (SEE INSTRUCTIONS)
OO and WC
5.
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)
o  
6.
CITIZENSHIP OR PLACE OF ORGANIZATION
Michigan
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON WITH
7.
SOLE VOTING POWER
0
8.
SHARED VOTING POWER
0
9.
SOLE DISPOSITIVE POWER
0
10.
SHARED DISPOSITIVE POWER
0
11.
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
0
12.
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)
o  
13.
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
0%
14.
TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
OO (limited liability company)
 
4

 
CUSIP No 74837R-10-4

1.
NAMES OF REPORTING PERSONS
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
Quicksilver Energy, L.P.
2.
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)
(a) o  
(b) x  
3.
SEC USE ONLY
4.
SOURCE OF FUNDS (SEE INSTRUCTIONS)
OO and WC
5.
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)
o  
6.
CITIZENSHIP OR PLACE OF ORGANIZATION
Texas
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON WITH
7.
SOLE VOTING POWER
22,783,456 (1)
8.
SHARED VOTING POWER
0
9.
SOLE DISPOSITIVE POWER
22,783,456 (1)
10.
SHARED DISPOSITIVE POWER
0
11.
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
22,783,456 (1)
12.
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)
o  
13.
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
29.1%
14.
TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
PN

(1)
Power is exercised through its sole general partner, Pennsylvania Management, LLC.

5

 
CUSIP No 74837R-10-4

1.
NAMES OF REPORTING PERSONS
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
Pennsylvania Management, LLC
2.
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)
(a) o  
(b) x  
3.
SEC USE ONLY
4.
SOURCE OF FUNDS (SEE INSTRUCTIONS)
OO and WC
5.
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)
o  
6.
CITIZENSHIP OR PLACE OF ORGANIZATION
Texas
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON WITH__
7.
SOLE VOTING POWER
22,783,456 (1)(2)
8.
SHARED VOTING POWER
0
9.
SOLE DISPOSITIVE POWER
22,783,456 (1)(2)
10.
SHARED DISPOSITIVE POWER
0
11.
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
22,783,456 (1)(2)
12.
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)
o  
13.
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
29.1%
14.
TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
OO (limited liability company)

(1)
Power is exercised as sole general partner of Quicksilver Energy, L.P.

(2)
Power is exercised through its three members, Glenn Darden, Thomas F. Darden and AnneDarden Self.

6


CUSIP No 74837R-10-4

1.
NAMES OF REPORTING PERSONS
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
Glenn Darden
2.
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)
(a) o  
(b) x  
3.
SEC USE ONLY
4.
SOURCE OF FUNDS (SEE INSTRUCTIONS)
PF and Not Applicable
5.
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)
o  
6.
CITIZENSHIP OR PLACE OF ORGANIZATION
USA
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON WITH
7.
SOLE VOTING POWER
1,487,981 (1)(2)(3)
8.
SHARED VOTING POWER
22,783,456 (4)
9.
SOLE DISPOSITIVE POWER
1,369,703 (1)(2)
10.
SHARED DISPOSITIVE POWER
22,783,456 (4)
11.
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
24,271,437 (1)(2)(3)(4)
12.
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)
o  
13.
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
30.9%
14.
TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
IN
 
 
(1)
Includes 54,899 shares subject to options that were vested or will vest within 60 days following September 21, 2007.

 
(2)
Includes 155,845 shares held in grantor retained annuity trusts and 11,657 shares represented by units Mr. Darden holds in a Unitized Stock Fund through Quicksilver Resources Inc.’s 401(k) plan as of September 7, 2007.

 
(3)
Includes 63,379 shares of unvested restricted stock.

 
(4)
Represents or includes 22,783,456 shares beneficially owned solely in his capacity as a member of Pennsylvania Management, LLC., the sole general partner of Quicksilver Energy, L.P.  Mr. Darden disclaims beneficial ownership of the 22,783,456 shares owned by Quicksilver Energy, L.P., except to the extent of his pecuniary interest in them arising from his ownership interest as a limited partner of Quicksilver Energy, L.P., as a shareholder of Mercury Production Company, another limited partner of Quicksilver Energy, L.P. and as a member of Pennsylvania Management, LLC.
 
7

 
CUSIP No 74837R-10-4

1.
NAMES OF REPORTING PERSONS
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
Thomas F. Darden
2.
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)
(a) o  
(b) x  
3.
SEC USE ONLY
4.
SOURCE OF FUNDS (SEE INSTRUCTIONS)
PF and Not Applicable
5.
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)
o  
6.
CITIZENSHIP OR PLACE OF ORGANIZATION
USA
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON WITH
7.
SOLE VOTING POWER
1,519,693 (1)(2)(3)
8.
SHARED VOTING POWER
22,783,456 (4)
9.
SOLE DISPOSITIVE POWER
1,435,939 (2)
10.
SHARED DISPOSITIVE POWER
22,783,456 (4)
11.
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
24,303,149 (1)(2)(3)(4)
12.
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)
o  
13.
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
31.0%
14.
TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
IN
 
 
(1)
Includes 20,375 shares subject to options that were vested or will vest within 60 days following September 21, 2007.

 
(2)
Includes 171,028 shares held in grantor retained annuity trusts and 44,047 shares represented by units Mr. Darden holds in a Unitized Stock Fund through Quicksilver Resources Inc.’s 401(k) plan as of September 7, 2007.

 
(3)
Includes 63,379 shares of unvested restricted stock.

 
(4)
Represents or includes 22,783,456 shares beneficially owned solely in his capacity as a member of Pennsylvania Management, LLC., the sole general partner of Quicksilver Energy, L.P.  Mr. Darden disclaims beneficial ownership of the 22,783,456 shares owned by Quicksilver Energy, L.P., except to the extent of his pecuniary interest in them arising from his ownership interest as a limited partner of Quicksilver Energy, L.P., as a shareholder of Mercury Production Company, another limited partner of Quicksilver Energy, L.P. and as a member of Pennsylvania Management, LLC.
 
8

 
CUSIP No 74837R-10-4

1.
NAMES OF REPORTING PERSONS
I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
Anne Darden Self
2.
CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)
(a) o  
(b) x  
3.
SEC USE ONLY
4.
SOURCE OF FUNDS (SEE INSTRUCTIONS)
PF and Not Applicable
5.
CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEM 2(d) OR 2(e)
o  
6.
CITIZENSHIP OR PLACE OF ORGANIZATION
USA
NUMBER OF
SHARES
BENEFICIALLY
OWNED BY
EACH
REPORTING
PERSON WITH
7.
SOLE VOTING POWER
1,091,214 (1)(2)(3)
8.
SHARED VOTING POWER
22,783,456 (4)
9.
SOLE DISPOSITIVE POWER
1,050,551 (2)
10.
SHARED DISPOSITIVE POWER
22,783,456 (4)
11.
AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
23,874,670 (1)(2)(3)(4)
12.
CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)
o  
13.
PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
30.4%
14.
TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)
IN
 
 
(1)
Includes 24,267 shares subject to options that were vested or will vest within 60 days following September 21, 2007.

 
(2)
Includes 155,571 shares held in grantor retained annuity trusts and includes 16,396 shares of unvested restricted stock and 21,393 shares represented by units Ms. Self holds in a Unitized Stock Fund through Quicksilver Resources Inc.’s 401(k) plan as of September 7, 2007.

 
(3)
Includes 16,396 shares of unvested restricted stock.

 
(4)
Represents or includes 22,783,456 shares are beneficially owned solely in her capacity as a member of Pennsylvania Management, LLC., the sole general partner of Quicksilver Energy, L.P.  Ms. Self disclaims beneficial ownership of the 22,783,456 shares owned by Quicksilver Energy, L.P., except to the extent of her pecuniary interest in them arising from her ownership interest as a limited partner of Quicksilver Energy, L.P., as a shareholder of Mercury Production Company, another limited partner of Quicksilver Energy, L.P. and as a member of Pennsylvania Management, LLC.

9


This statement on Schedule 13D is an initial filing by Mercury Production Company, Quicksilver Energy, L.P. and Pennsylvania Management, LLC.  It further amends and restates in its entirety: (i) a statement on Schedule 13D filed by Quicksilver Energy, L.C. on March 12, 1999; (ii) statements on Schedule 13D filed by Mercury Exploration Company, and Anne Darden Self on March 12, 1999, as each such statement was amended by an Amendment No. 1 filed on January 21, 2000; and (iii) statements on Schedule 13D filed by Glenn Darden and Thomas F. Darden on March 16, 1999, as each statement was amended by an Amendment No. 1 filed on January 21, 2000.  Shares of the common stock of Quicksilver Resources Inc. previously held by Quicksilver Energy, L.C., Mercury Production Company, and Mercury Exploration Company are now held by Quicksilver Energy, L.P. as a result of:

(i) a merger of Quicksilver Energy, L.C. into Quicksilver Energy, L.P. effective December 31, 2003, which constituted a change of jurisdiction and form of organization of Quicksilver Energy, L.C. without any change in underlying ownership; and

(ii) a contribution of shares to Quicksilver Energy, L.P. by Mercury Production Company and Mercury Exploration Company effective October 6, 2006.

Item 1.
Security and Issuer

Item 1 is hereby amended and restated in its entirety as follows:

This Schedule 13D relates to the common stock of Quicksilver Resources Inc. (“QRI”). QRI is a Delaware corporation and its principal executive officers are located at 777 West Rosedale Street, Fort Worth, Texas 76104.

Item 2.
Identity and Background

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

 
(a)
Pursuant to Regulation 13D-G of the General Rules and Regulations under the Securities Exchange Act of 1934, as amended (the “Act”), the undersigned hereby file this Schedule 13D on behalf of Mercury Exploration Company, a Texas for-profit corporation (“Mercury Exploration”), Mercury Production Company, a Texas for-profit corporation (“Mercury Production”), Quicksilver Energy, L.C., a Michigan limited liability company (“QELC”), Quicksilver Energy, L.P., a Texas limited partnership (“QELP”), Pennsylvania Management, LLC, a Texas limited liability company (“Pennsylvania”), Glenn Darden, Thomas F. Darden and Anne Darden Self.  Mercury Exploration, Mercury Production, QELC, QELP, Pennsylvania, Glenn Darden, Thomas F. Darden and Anne Darden Self are sometimes hereinafter referred to as the “Reporting Persons.” The Reporting Persons are making this single, joint filing because they may be deemed to constitute a “group” within the meaning of Section 13(d)(3) of the Act, although neither the fact of this filing, nor anything contained herein shall be deemed to be an admission by the Reporting Persons that a group exists.

(b)-(c)
Reporting Persons

Mercury Exploration

Mercury Exploration is a Texas corporation, the principal business of which is investment management.  The principal business address of Mercury Exploration, which also serves as its principal office, is 777 West Rosedale Street, Fort Worth, Texas 76104.  Glenn Darden, Thomas F. Darden and Anne Darden Self are directors of Mercury Exploration.  Ms. Self is also the President of Mercury Exploration.

Mercury Production

Mercury Production is a Texas corporation, the principal business of which is investment management.  Mercury Production is the sole shareholder of Mercury Exploration.  The principal business address of Mercury Production, which also serves as its principal office, is 777 West Rosedale Street, Fort Worth, Texas 76104.  Glenn Darden, Thomas F. Darden and Anne Darden Self are directors of Mercury Production.  Ms. Self is also the President of Mercury Production.

10


QELC

QELC is a former Michigan limited liability company, the existence of which ceased upon the merger of QELC with and into QELP effective December 31, 2003.

QELP

QELP is a Texas limited partnership, the principal business of which is investment management.  The principal business address of QELP, which also serves as its principal office, is 777 West Rosedale Street, Fort Worth, Texas 76104.  The sole general partner of QELP is Pennsylvania.

Pennsylvania

Pennsylvania is a Texas limited liability company, the principal business of which is acting as the general partner of QELP.  The principal business address of Pennsylvania, which also serves as its principal office, is 777 West Rosedale Street, Fort Worth, Texas 76104.  The members of Pennsylvania are Glenn Darden, Thomas F. Darden and Anne Darden Self.

Glenn Darden

Glenn Darden’s business address is 777 West Rosedale Street, Fort Worth, Texas 76104, and his present principal occupation or employment at such address is President and Chief Executive Officer of QRI.

Thomas F. Darden

Thomas F. Darden’s business address is 777 West Rosedale Street, Fort Worth, Texas 76104, and his present principal occupation or employment at such address is Chairman of the Board of QRI.

Anne Darden Self

Anne Darden Self’s business address is 777 West Rosedale Street, Fort Worth, Texas 76104, and her present principal occupation or employment at such address is Vice President-Human Resources of QRI and President of Mercury Production and Mercury Exploration.

(d)
None of the Reporting Persons has, during the last five years, been convicted in a criminal proceeding (excluding traffic violations or similar misdemeanors).

(e)
None of the Reporting Persons has, during the last five years, been a party to a civil proceeding of a judicial or administrative body of competent jurisdiction and as a result of such proceeding was or is subject to a judgment, decree or final order enjoining future violations of, or prohibiting or mandating activities subject to such laws.

(f)
Glenn Darden, Thomas F. Darden and Anne Darden Self are citizens of the United States of America.

11


Item 3.
Source and Amount of Funds or Other Consideration

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

Mercury Exploration’s acquisitions and dispositions of QRI common stock, commencing with its first acquisition, are detailed in the following schedule, which also shows the source and amount of funds or other consideration paid in the case of all acquisitions:

Transaction Date
 
Number of
Shares Acquired
(Disposed of)
 
Description of Transaction
 
Source of Funds
 
Amount of
Funds
                 
01/01/98
 
31,539
 
Contribution of Assets for Stock
 
N/A
 
N/A
03/04/99
 
3,220,284
 
Stock Dividend
 
N/A
 
N/A
03/04/99
 
647,999
 
Merger Consideration
 
N/A
 
N/A
07/15/99
 
1,340,405
 
Purchase
 
Working capital
 
$10,897,493
09/17/99
 
(25,300)
 
Gift
 
N/A
 
N/A
06/16/00
 
(50,000)
 
Gift
 
N/A
 
N/A
08/31/01
 
100,000
 
Warrant Exercise
 
Working capital
 
$1,250,000
12/21/01
 
(125,000)
 
Gift
 
N/A
 
N/A
12/31/01
 
(12,410)
 
Sale
 
N/A
 
N/A
02/26/02
 
197,000
 
Warrant Exercise
 
Working Capital
 
$2,462,500
02/26/02
 
(197,000)
 
Sale
 
N/A
 
N/A
04/02/02
 
297,000
 
Warrant Exercise
 
Working Capital
 
$5,940,000
04/02/02
 
(297,000)
 
Sale
 
N/A
 
N/A
03/30/03
 
(372)
 
Distribution Shareholders
 
N/A
 
N/A
08/20/03
 
(525,000)
 
Sale
 
N/A
 
N/A
06/30/04
 
4,602,145
 
Stock Dividend
 
N/A
 
N/A
12/20/04
 
(362,000)
 
Sale
 
N/A
 
N/A
12/30/04
 
(100,000)
 
Gift
 
N/A
 
N/A
06/30/05
 
4,371,145
 
Stock Dividend
 
N/A
 
N/A
10/06/06
 
4,500
 
Contribution from MPC
 
N/A
 
N/A
10/06/06
 
(13,117,935)
 
Contribution to QELP
 
N/A
 
N/A
   
-0-
           

Mercury Production’s acquisitions and dispositions of QRI common stock, commencing with its first acquisition, are detailed in the following schedule, which also shows the source and amount of funds or other consideration paid in the case of all acquisitions:

Transaction Date
 
Number of
Shares Acquired
(Disposed of)
 
Description of Transaction
 
Source of Funds
 
 
Amount of
Funds
                 
03/04/99
 
1,500
 
Merger Consideration
 
N/A
 
N/A
06/30/04
 
1,500
 
Stock Dividend
       
06/30/05
 
1,500
 
Stock Dividend
 
N/A
 
N/A
10/06/06
 
(4,500)
 
Contribution to MEC
 
N/A
 
N/A
   
-0-
           
 
12


QELC’s acquisitions and dispositions of QRI common stock, commencing with its first acquisition, are detailed in the following schedule, which also shows the source and amount of funds or other consideration paid in the case of all acquisitions:

Transaction Date
 
Number of
Shares Acquired
(Disposed of)
 
Description of Transaction
 
Source of Funds
 
Amount of
Funds
                 
01/01/98
 
29,395
 
Contribution of Assets for Stock
 
N/A
 
N/A
03/04/99
 
3,001,466
 
Stock Dividend
       
12/31/03
 
(3,030,861)
 
Merger into QELP
 
N/A
 
N/A
   
-0-
           

QELP’s acquisitions and dispositions of QRI common stock, commencing with its first acquisition, are detailed in the following schedule, which also shows the source and amount of funds or other consideration paid in the case of all acquisitions:

Transaction Date
 
Number of
Shares Acquired
(Disposed of)
 
Description of Transaction
 
Source of Funds
 
Amount of
Funds
                 
12/31/03
 
3,030,861
 
Merger with QELC
 
N/A
 
N/A
06/30/04
 
3,030,861
 
Stock Dividend
 
N/A
 
N/A
06/30/05
 
3,030,861
 
Stock Dividend
 
N/A
 
N/A
10/06/06
 
512,490
 
Contribution from Trusts
 
N/A
 
N/A
10/06/06
 
13,117,935
 
Contribution from MEC
 
N/A
 
N/A
03/31/07
 
25,119
 
Gift
 
N/A
 
N/A
03/31/07
 
9,936
 
Gift
 
N/A
 
N/A
03/31/07
 
25,393
 
Gift
 
N/A
 
N/A
   
22,783,456
           

Glenn Darden’s acquisitions and dispositions of QRI common stock, commencing with his first acquisition, are detailed in the following schedule, which also shows the source and amount of funds or other consideration paid in the case of all acquisitions:

Transaction Date
 
Number of
Shares Acquired
(Disposed of)
 
Description of Transaction
 
Source of Funds
 
Amount of
Funds
                 
01/01/98
 
2,356
 
Contribution of Assets for Stock
 
N/A
 
N/A
03/04/99
 
240,566
 
Stock Dividend
       
03/04/99
 
118,050
 
Merger Consideration
 
N/A
 
N/A
04/21/99
 
4,050
 
Open Market Purchase
 
PF
 
$25,950
05/11-27/99
 
1,200
 
Open Market Purchase
 
PF
 
$7,725
12/10/99
 
5,000
 
Open Market Purchase
 
PF
 
$19,988
12/20/99
 
(8,550)
 
Gifts
 
N/A
 
N/A
12/20/99
 
5,700
 
Gifts
 
N/A
 
N/A
02/08/00
 
(7,800)
 
Gifts
 
N/A
 
N/A
10/25/01
 
100
 
Open Market Purchase
 
PF
 
$1,410
02/01/02
 
5,100
 
Stock Grant
 
N/A
 
N/A
03/07/02
 
11,428
 
Option Exercise
 
PF
 
$99,995
06/30/04
 
377,200
 
Stock Dividend
 
N/A
 
N/A
02/08/05
 
6,092
 
Stock Grant
 
N/A
 
N/A
02/11/05
 
162,712
 
Option Exercise
 
PF
 
$300,008
02/23/05
 
(115,000)
 
Contribution to GRAT
 
N/A
 
N/A
05/27/05
 
(950)
 
Gifts
 
N/A
 
N/A
06/30/05
 
403,627
 
Stock Dividend
 
N/A
 
N/A
12/22/05
 
(44,300)
 
Gift
 
N/A
 
N/A
01/26/06
 
22,000
 
Stock Grant
 
N/A
 
N/A
02/24/06
 
24,999
 
Option Exercise
 
PF
 
$133,662
03/27/06
 
69,948
 
Distribution from GRAT
 
N/A
 
N/A
05/03/06
 
(69,948)
 
Contribution from GRAT
 
N/A
 
N/A
06/13/06
 
10,000
 
Open Market Purchase
 
PF
 
$299,800
01/01/07
 
42,000
 
Stock Grant
 
N/A
 
N/A
03/31/07
 
77,883
 
Distribution to G.Darden
 
N/A
 
N/A
03/31/07
 
8,464
 
Gift
 
N/A
 
N/A
05/03/07
 
34,725
 
Distribution to G.Darden
 
N/A
 
N/A
05/10/07
 
(112,608)
 
Contribution to GRAT
 
N/A
 
N/A
05/10/07
 
(8,464)
 
Contribution to GRAT
 
N/A
 
N/A
   
1,265,580
           
 
13


Thomas F. Darden’s acquisitions and dispositions of QRI common stock, commencing with his first acquisition, are detailed in the following schedule, which also shows the source and amount of funds or other consideration paid in the case of all acquisitions:
 
Transaction Date
 
Number of
Shares Acquired
(Disposed of)
 
Description of Transaction
 
Source of Funds
 
Amount of Funds
                 
01/01/98
 
2,356
 
Contribution of Assets for Stock
 
N/A
 
N/A
03/04/99
 
240,566
 
Stock Dividend
       
03/04/99
 
118,900
 
Merger Consideration
 
N/A
 
N/A
12/20/99
 
(5,700)
 
Gifts
 
N/A
 
N/A
12/20/99
 
5,700
 
Gifts
 
N/A
 
N/A
02/08/00
 
(5,200)
 
Gifts
 
N/A
 
N/A
12/31/02
 
(1,230)
 
Gifts
 
N/A
 
N/A
02/01/02
 
5,100
 
Stock Grant
 
N/A
 
N/A
03/07/02
 
11,428
 
Option Exercise
 
PF
 
$99,995
03/05/03
 
(912)
 
Gifts
 
N/A
 
N/A
06/30/04
 
371,008
 
Stock Dividend
 
N/A
 
N/A
02/08/05
 
6,092
 
Stock Grant
 
N/A
 
N/A
02/11/05
 
162,712
 
Option Exercise
 
PF
 
$300,008
03/02/05
 
(115,000)
 
Contribution to GRAT
 
N/A
 
N/A
06/30/05
 
397,910
 
Stock Dividend
 
N/A
 
N/A
12/22/05
 
(33,000)
 
Gifts
 
N/A
 
N/A
01/26/06
 
22,000
 
Stock Grant
 
N/A
 
N/A
03/24/06
 
59,523
 
Option Exercise
 
PF
 
$453,541
03/27/06
 
74,996
 
Distribution from GRAT
 
N/A
 
N/A
05/03/06
 
(74,996)
 
Contribution to GRAT
 
N/A
 
N/A
12/20/06
 
(10)
 
Gift
 
N/A
 
N/A
01/01/07
 
42,000
 
Stock Grant
 
N/A
 
N/A
03/31/07
 
87,568
 
Distribution from GRAT
 
N/A
 
N/A
03/31/07
 
8,464
 
Gift
 
N/A
 
N/A
04/14/07
 
32,178
 
Distribution from GRAT
 
N/A
 
N/A
05/10/07
 
(119,746)
 
Contribution to GRAT
 
N/A
 
N/A
05/10/07
 
(8,464)
 
Contribution to GRAT
 
N/A
 
N/A
   
1,284,243
           
 
14

 
Anne Darden Self’s acquisitions and dispositions of QRI common stock, commencing with her first acquisition, are detailed in the following schedule, which also shows the source and amount of funds or other consideration paid in the case of all acquisitions:

Transaction Date
 
Number of
Shares Acquired
(Disposed of)
 
Description of Transaction
 
Source of Funds
 
Amount of
Funds
                 
01/01/98
 
2,356
 
Contribution of Assets for Stock
 
N/A
 
N/A
       
Stock Dividend
 
N/A
 
N/A
03/04/99
 
114,450
 
Merger Consideration
 
N/A
 
N/A
12/20/99
 
(15,600)
 
Gifts
 
N/A
 
N/A
12/20/99
 
5,700
 
Gifts
 
N/A
 
N/A
02/08/00
 
(17,100)
 
Gifts
 
N/A
 
N/A
02/01/01
 
3,400
 
Stock Grant
 
N/A
 
N/A
08/31/01
 
10,000
 
Warrant Exercise
 
PF
 
$125,000
06/30/04
 
343,773
 
Stock Dividend
 
N/A
 
N/A
02/08/05
 
2,125
 
Stock Grant
 
N/A
 
N/A
03/14/05
 
(115,000)
 
Contribution to GRAT
 
N/A
 
N/A
06/30/05
 
287,336
 
Stock Dividend
 
N/A
 
N/A
08/23/05
 
(525)
 
Gifts
 
N/A
 
N/A
01/26/06
 
9,000
 
Stock Grant
 
N/A
 
N/A
02/24/06
 
12,501
 
Option Exercise
 
PF
 
$66,839
03/27/06
 
67,591
 
Distribution from GRAT
 
N/A
 
N/A
05/03/06
 
(67,591)
 
Contribution to GRAT
 
N/A
 
N/A
01/01/07
 
7,000
 
Stock Grant
 
N/A
 
N/A
03/31/07
 
79,516
 
Distribution from GRAT
 
N/A
 
N/A
03/31/07
 
8,464
 
Gift
 
N/A
 
N/A
05/03/07
 
33,772
 
Distribution from GRAT
 
N/A
 
N/A
05/10/07
 
(113,288)
 
Contribution to GRAT
 
N/A
 
N/A
05/10/07
 
(8,464)
 
Contribution to GRAT
 
N/A
 
N/A
   
889,983
           

Item 4.
Purpose of Transaction

Item 4 is hereby amended and restated in its entirety as follows:

The common stock of QRI was acquired and is being held by the Reporting Persons as an investment.  None of the Reporting Persons has any present plans and none contemplate any present proposals that would result in any of the transactions described in Item 4 of Schedule 13D.

Item 5.
Interest in Securities of the Issuer

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

(a)-(b)
Reporting Persons
 
 
Mercury Exploration

Mercury Exploration no longer beneficially owns shares of the common stock of QRI.

Mercury Production

Mercury Production no longer beneficially owns shares of the common stock of QRI.

15


QELC

QELC no longer beneficially owns shares of the common stock of QRI.

QELP

QELP beneficially owns 22,783,456 shares of the common stock of QRI, which constitutes approximately 29.1% of the outstanding shares of the common stock.  QELP’s percentage of beneficial ownership was arrived at by dividing the total number of shares of common stock beneficially owned by 78,425,511, which represents the shares of QRI common stock outstanding as of July 31, 2007, according to the quarterly report on Form 10-Q of QRI for the quarterly period ended June 30, 2007, filed with the Securities and Exchange Commission on July 31, 2007.  QELP has the sole power to vote or to direct the vote of 22,783,456 shares of QRI common stock, and the sole power to dispose or to direct the disposition of 22,783,456 shares of QRI common stock.

Pennsylvania

In its capacity as the sole general partner of QELP, Pennsylvania may, pursuant to Rule 13d-3 of the Act, be deemed to be the beneficial owner of 22,783,456 shares of QRI common stock, which constitutes approximately 29.1% of the outstanding shares of the common stock.  As the sole general partner of QELP, Pennsylvania has the sole power to vote or to direct the vote of 22,783,456 shares of QRI common stock, and the sole power to dispose or to direct the disposition of 22,783,456 shares of QRI common stock.

Glenn Darden

As a member of Pennsylvania, Glenn Darden may, pursuant to Rule 13d-3 of the Act, be deemed to be the beneficial owner of 22,783,456 shares of QRI common stock held by QELP, which constitutes approximately 29.1% of the outstanding shares of QRI common stock. Mr. Darden shares the power to vote and dispose of these shares as a member of Pennsylvania. Mr. Darden disclaims beneficial ownership of the 22,783,456 shares of QRI common stock owned by QELP, except to the extent of his pecuniary interest in them arising from his ownership interest as a limited partner of QELP, as a shareholder of Mercury Production and as a member of Pennsylvania.

Mr. Darden has the sole power to vote or to direct the vote of 1,487,981 shares of QRI common stock (or approximately 1.8% of its outstanding shares), including shares subject to the options as described below, 11,657 shares represented by units in a Unitized Stock Fund held through the QRI 401(k) plan as described below and 155,845 shares held in grantor retained annuity trusts.  Mr. Darden has the sole power to dispose or to direct the disposition of 1,369,703 shares, including the 155,845 shares held in the grantor retained annuity trusts and the shares represented by units in the Unitized Stock Fund held through the QRI 401(k) plan.

Mr. Darden owns options to purchase 54,899 shares of QRI common stock that were vested or will vest within 60 days following September 21, 2007. Such options were issued to Mr. Darden under the QRI 1999 Stock Option and Retention Stock Plan.

As of September 7, 2007, Mr. Darden owned 11,657 shares represented by units in a Unitized Stock Fund held through the QRI 401(k) plan.

16


Together, QELP’s shares, Mr. Darden’s directly held shares, his options to purchase shares of QRI common stock, the shares held in grantor retained annuity trusts and his 401(k) plan shares represent 31.0% of the total issued and outstanding shares.

Thomas F. Darden

As a member of Pennsylvania, Thomas F. Darden may, pursuant to Rule 13d-3 of the Act, be deemed to be the beneficial owner of 22,783,456 shares of QRI common stock held by QELP, which constitutes approximately 29.1% of the outstanding shares of QRI common stock. Mr. Darden shares the power to vote and dispose of these shares as a member of Pennsylvania. Mr. Darden disclaims beneficial ownership of the 22,783,456 shares of QRI common stock owned by QELP, except to the extent of his pecuniary interest in them arising from his ownership interest as a limited partner of QELP, as a shareholder of Mercury Production and as a member of Pennsylvania.

Mr. Darden has the sole power to vote or direct the vote of 1,519,693 shares of QRI common stock (or approximately 1.8% of its outstanding shares), including shares subject to the options as described below, 44,047 shares represented by units in a Unitized Stock Fund held through the QRI 401(k) plan as described below and 171,028 shares held in grantor retained annuity trusts.  Mr. Darden has the sole power to dispose or direct the disposition of 1,435,939 shares, including the 171,028 shares held in grantor retained annuity trusts and the 44,047 shares represented by units in a Unitized Stock Fund held through the QRI 401(k) plan.

Mr. Darden owns options to purchase 20,375 shares of QRI common stock that were vested or will vest within 60 days following September 21, 2007. Such options were issued to Mr. Darden under the QRI 1999 Stock Option and Retention Stock Plan.

As of September 7, 2007, Mr. Darden owned 44,047 shares represented by units in a Unitized Stock Fund through the QRI 401(k) plan.

Together, QELP’s shares, Mr. Darden’s directly held shares, his options to purchase shares of QRI common stock, the shares held in grantor retained annuity trusts, his 401(k) plan shares represent 31.0% of the total issued and outstanding shares.

Anne Darden Self

As a member of Pennsylvania, Anne Darden Self may, pursuant to Rule 13d-3 of the Act, be deemed to be the beneficial owner of 22,783,456 shares of QRI common stock held by QELP, which constitutes approximately 29.1% of the outstanding shares of QRI common stock. Ms. Self shares the power to vote and dispose of these shares as a member of Pennsylvania. Ms. Self disclaims beneficial ownership of the 22,783,456 shares of QRI common stock owned by QELP, except to the extent of her pecuniary interest in them arising from her ownership interest as a limited partner of QELP and as a member of Pennsylvania.

Ms. Self has the sole power to vote or direct the vote of 1,091,214 shares of QRI common stock (or approximately 1.3% of its outstanding shares), including the shares exercisable under the options as described below, 21,393 shares represented by units in a Unitized Stock Fund held through the QRI 401(k) plan as described below and 155,571 shares held in grantor retained annuity trusts.  Ms. Self has the sole power to dispose or direct the disposition of 1,050,551 shares, including the 155,571 shares held in grantor retained annuity trusts and the 21,393 shares represented by units in a Unitized Stock Fund through the QRI 401(k) plan as of September 7, 2007 as described below.

17


Ms. Self owns options to purchase 24,267 shares of QRI common stock that were vested or will vest within 60 days following September 21, 2007. Such options were issued to Ms. Self under the QRI 1999 Stock Option and Retention Stock Plan.

As of September 7, 2007, Ms. Self owned 21,393 shares represented by units in a Unitized Stock Fund held through the QRI 401(k) plan.

Together, QELP’s shares, Ms. Self’s directly held shares, her options to purchase shares of QRI common stock, the shares held in grantor retained annuity trusts and her 401(k) plan shares represent 30.4% of the total issued and outstanding shares.

To the best of the knowledge of the Reporting Persons, other than as set forth above, none of the persons named in Item 2 herein is the beneficial owner of any shares of QRI common stock.

 
(c)
To the best of the knowledge of the Reporting Persons, none of the persons named in response to paragraph (a) has effected any transactions in the shares of QRI common stock during the past 60 days.

 
(d)
The Reporting Persons affirm that no person other than the Reporting Persons has the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the shares of QRI common stock owned by the Reporting Persons.

 
(e)
QELC ceased to be the beneficial owner of more than five percent of QRI common stock on December 31, 2003 as a result of a merger into QELP effective as of that date.  Mercury Production and Mercury Exploration each ceased to be the beneficial owner of more than five percent of QRI common stock effective October 6, 2006.

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:

As detailed in the following table, QELP, Glenn Darden, Thomas F. Darden and Anne Darden Self have pledged portions of their directly owned shares of QRI common stock to financial institutions to secure loans made under credit facilities established by the Reporting Persons.  The occurrence of an event of default under a Reporting Person’s credit facility could result in the Reporting Person’s loss of voting power and investment power with respect to the shares pledged to secure such credit facility.

Reporting
 
Number of
 
Date of Credit
 
Financial
Person
 
Pledged Shares
 
Facility
 
Institution
             
QELP
 
500,000
 
August 19, 2005
 
JPMorgan Chase Bank, N.A.
   
1,815,431
 
November 3, 2005
 
Citigroup Global Markets Inc.
             
Glenn Darden
 
172,712
 
April 30, 2005
 
Citigroup Global Markets Inc.
   
360,150
 
September 14, 2007
 
Citigroup Global Markets Inc.
             
Thomas F. Darden
 
469,068
 
November 16, 2005
 
Frost National Bank
   
366,346
 
December 15, 2005
 
JPMorgan Chase Bank, N.A.
   
75,000
 
November 11, 2005
 
Citigroup Global Markets Inc.
             
Anne D. Self
 
20,000
 
July 12, 2004
 
Citigroup Global Markets Inc.
 
18


As indicated in Item 5 above, each of Glenn Darden, Thomas F. Darden and Anne Darden Self is a holder of options issued under the QRI 1999 Stock Option and Retention Stock Plan. To the best knowledge of the Reporting Persons, none of the persons named in response to paragraph (a) has any contract, arrangement, understanding or relationship (legal or otherwise) with respect to any securities of QRI, except as set forth above.


Item 7.
Material to be Filed as Exhibits

Exhibit A
Joint Filing Statement (filed herewith).

Signatures

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

Dated:
September 21, 2007

 
MERCURY EXPLORATION COMPANY
     
     
 
By:
/s/ Anne Darden Self
   
Anne Darden Self, President
     
     
 
MERCURY PRODUCTION COMPANY
     
     
 
By:
/s/ Anne Darden Self
   
Anne Darden Self, President
     
     
 
QUICKSILVER ENERGY, L.C.
     
 
By:
QUICKSILVER ENERGY, L.P., successor by merger
 
By:
PENNSYLVANIA MANAGEMENT, LLC, general partner
     
     
 
By:
/s/ Anne Darden Self
   
Anne Darden Self, Manager
     
     
 
QUICKSILVER ENERGY, L.P.
     
     
 
By:
PENNSYLVANIA MANAGEMENT, LLC, general partner
     
 
By:
/s/ Anne Darden Self
   
Anne Darden Self, Manager
     
     
 
PENNSYLVANIA MANAGEMENT, LLC
     
     
 
By:
/s/ Anne Darden Self
   
Anne Darden Self, Manager

19


 
/s/ Glenn Darden
 
Glenn Darden
     
     
 
/s/ Thomas F. Darden
 
Thomas F. Darden
     
     
 
/s/ Anne Darden Self
 
Anne Darden Self

Exhibit A

Joint Filing Statement

We, the undersigned, hereby express our agreement that the attached Schedule 13D is, and any further amendments thereto signed by each of the undersigned shall be, filed on behalf of each of us pursuant to and in accordance with the provisions of Rule 13d-1(k) under the Securities Exchange Act of 1934. This agreement may be terminated with respect to the obligations to jointly file future amendments to such statement on Schedule 13D as to any of the undersigned upon such person giving written notice thereof to each of the other persons signatory hereto, at the principal office thereof.


Dated:  September 21, 2007

 
MERCURY EXPLORATION COMPANY
     
     
 
By:
/s/ Anne Darden Self
   
Anne Darden Self, President
     
     
 
MERCURY PRODUCTION COMPANY
     
     
 
By:
/s/ Anne Darden Self
   
Anne Darden Self, President
     
     
 
QUICKSILVER ENERGY, L.C.
     
 
By:
QUICKSILVER ENERGY, L.P., successor by merger
 
By:
PENNSYLVANIA MANAGEMENT, LLC, general partner
     
     
 
By:
/s/ Anne Darden Self
   
Anne Darden Self, Manager

20


 
QUICKSILVER ENERGY, L.P.
     
     
 
By:
PENNSYLVANIA MANAGEMENT, LLC, general partner
     
 
By:
/s/ Anne Darden Self
   
Anne Darden Self, Manager
     
     
 
PENNSYLVANIA MANAGEMENT, LLC
     
     
 
By:
/s/ Anne Darden Self
   
Anne Darden Self, Manager
     
     
 
/s/ Glenn Darden
 
Glenn Darden
     
     
 
/s/ Thomas F. Darden
 
Thomas F. Darden
     
     
 
/s/ Anne Darden Self
 
Anne Darden Self
 
 
21

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