| 657299 | May 9, 2008 | May 9, 2008 | Muirfield Exploration, Ltd. | Clay | NT Lease #23A | 1,000 | 07735020 |
| 656990 | Mar 20, 2008 | Mar 20, 2008 | Muirfield Exploration, Ltd. | Clay | Logan #3 | 1,000 | 07735011 |
| 656985 | Mar 20, 2008 | Mar 20, 2008 | Muirfield Exploration, Ltd. | Clay | NT Stine #1 | 1,000 | 07735010 |
| 656981 | Mar 20, 2008 | Mar 20, 2008 | Muirfield Exploration, Ltd. | Clay | NT #2 | 1,000 | 07735009 |
| 653802 | Mar 5, 2008 | Mar 5, 2008 | Muirfield Exploration, Ltd. | Clay | NT 5 #7 | 1,000 | 07735005 |
| 653799 | Mar 4, 2008 | Mar 4, 2008 | Muirfield Exploration, Ltd. | Clay | NT 5 #8 | 1,000 | 07735004 |
| 650128 | Dec 21, 2007 | Dec 21, 2007 | Muirfield Exploration, Ltd. | Clay | NT5 #6 | 1,000 | 07734991 |
| 650127 | Dec 21, 2007 | Dec 21, 2007 | Muirfield Exploration, Ltd. | Clay | NT5 #4 | 1,000 | 07734990 |
| 639454 | Dec 8, 2007 | Dec 8, 2007 | Muirfield Exploration, Ltd. | Clay | Stine NT #7 | 3,000 | 07734984 |
| 650126 | Nov 30, 2007 | Nov 30, 2007 | Muirfield Exploration, Ltd. | Clay | NT5 #3 | 1,000 | 07734985 |
| 648239 | Nov 6, 2007 | Nov 6, 2007 | Muirfield Exploration, Ltd. | Clay | Dalton #1 | 3,000 | 07734980 |
| 648056 | Oct 29, 2007 | Oct 29, 2007 | Muirfield Exploration, Ltd. | Clay | Logan #2 | 3,000 | 07734981 |
| 648057 | Oct 24, 2007 | Oct 24, 2007 | Muirfield Exploration, Ltd. | Clay | NT5 #1 | 1,000 | 07734979 |
| 647135 | Oct 8, 2007 | Oct 8, 2007 | Muirfield Exploration, Ltd. | Clay | Thornberry, Louella #62 | 2,000 | 07734977 |
| 641048 | Jul 27, 2007 | Jul 27, 2007 | Muirfield Exploration, Ltd. | Clay | Stine NT 1 #1 | 3,000 | 07734970 |
| 639273 | Jun 11, 2007 | Jun 11, 2007 | Muirfield Exploration, Ltd. | Clay | Stine NT 2 #2 | 2,600 | 07734967 |
| 639709 | Jun 4, 2007 | Jun 4, 2007 | Muirfield Exploration, Ltd. | Clay | NT5 #5 | 3,000 | 07734964 |
| 639708 | Jun 4, 2007 | Jun 4, 2007 | Muirfield Exploration, Ltd. | Clay | Stine NT4 #4 | 3,000 | 07734965 |
| 628313 | Oct 31, 2006 | Oct 31, 2006 | Muirfield Exploration, Ltd. | Clay | Logan #1 | 2,000 | 07734956 |
| 628278 | Oct 31, 2006 | Oct 31, 2006 | Muirfield Exploration, Ltd. | Clay | Stine #2 | 2,200 | 07734955 |
| 616547 | Mar 31, 2006 | Mar 31, 2006 | Muirfield Exploration, Ltd. | Clay | Louella Thornberry #65 | 2,000 | 07734938 |
| 613370 | Feb 6, 2006 | Feb 6, 2006 | Muirfield Exploration, Ltd. | Clay | Joint #13 | 2,000 | 07734935 |
| 613363 | Feb 6, 2006 | Feb 6, 2006 | Muirfield Exploration, Ltd. | Clay | Thornberry, Louella #64 | 2,000 | 07734934 |
| 609495 | Nov 17, 2005 | Nov 17, 2005 | Muirfield Exploration, Ltd. | Clay | Firestone, Tom #39 | 2,000 | 07734920 |
| 608673 | Nov 1, 2005 | Nov 1, 2005 | Muirfield Exploration, Ltd. | Clay | Thornberry #35 | 2,000 | 07734919 |
| 606698 | Sep 23, 2005 | Sep 23, 2005 | Muirfield Exploration, Ltd. | Foard | Cooper #13 | 2,100 | 15530691 |
| 600599 | May 12, 2005 | May 12, 2005 | Muirfield Exploration, Ltd. | Clay | Taylor Estate, Etal #48 | 2,000 | 07734906 |
| 600569 | May 12, 2005 | May 12, 2005 | Muirfield Exploration, Ltd. | Clay | Tom Firestone #38 | 2,000 | 07734904 |
| 600565 | May 12, 2005 | May 12, 2005 | Muirfield Exploration, Ltd. | Clay | Louella Thornberry #63 | 2,000 | 07734905 |
| 600078 | May 2, 2005 | May 2, 2005 | Muirfield Exploration, Ltd. | Clay | Stine #1 | 2,200 | 07734902 |
| 551873 | Oct 5, 2004 | Oct 5, 2004 | Muirfield Exploration, Ltd. | Clay | Thornberry, Louella #62 | 2,000 | 07734890 |
| 550865 | Sep 16, 2004 | Sep 16, 2004 | Muirfield Exploration, Ltd. | Clay | Thornberry, Louella #61 | 2,000 | 07734883 |
| 543417 | Mar 18, 2004 | Mar 18, 2004 | Muirfield Exploration, Ltd. | Foard | Cooper #12 | 2,400 | 15530667 |
| 540235 | Dec 30, 2003 | Dec 30, 2003 | Muirfield Exploration, Ltd. | Clay | Taylor -A- #65 | 2,000 | 07734876 |
| 539164 | Dec 2, 2003 | Dec 2, 2003 | Muirfield Exploration, Ltd. | Montague | Uselton #1 | 3,000 | 33733592 |
| 537935 | Oct 30, 2003 | Oct 30, 2003 | Muirfield Exploration, Ltd. | Clay | Taylor #1 | 2,000 | 07734654 |
| 532610 | Jun 5, 2003 | Jun 5, 2003 | Muirfield Exploration, Ltd. | Clay | Firestone, Tom #37 | 2,000 | 07734863 |
| 526583 | Dec 30, 2002 | Dec 30, 2002 | Muirfield Exploration, Ltd. | Clay | Taylor -A- #64 | 2,000 | 07734850 |
| 525212 | Dec 18, 2002 | Dec 18, 2002 | Muirfield Exploration, Ltd. | Clay | Firestone, Tom #36 | 2,000 | 07734848 |
| 522502 | Aug 8, 2002 | Aug 8, 2002 | Muirfield Exploration, Ltd. | Clay | Taylor -A- #63 | 2,000 | 07734895 |
| 521601 | Jul 11, 2002 | Jul 11, 2002 | Muirfield Exploration, Ltd. | Clay | Taylor -A- #56 | 1,100 | 07720073 |
| 521530 | Jul 5, 2002 | Jul 5, 2002 | Muirfield Exploration, Ltd. | Clay | Firestone, Tom #35 | 2,000 | 07734843 |
| 518013 | Mar 1, 2002 | Mar 1, 2002 | Muirfield Exploration, Ltd. | Clay | Taylor "A" #62 | 2,000 | 07734838 |
| 514713 | Oct 25, 2001 | Oct 25, 2001 | Muirfield Exploration, Ltd. | Clay | Firestone, Tom #34 | 2,000 | 07734833 |
| 511197 | Jul 13, 2001 | Jul 13, 2001 | Muirfield Exploration, Ltd. | Clay | Firestone, Tom #32 | 2,000 | 07734828 |
| 511196 | Jul 13, 2001 | Jul 13, 2001 | Muirfield Exploration, Ltd. | Clay | Firestone, Tom #33 | 2,000 | 07734827 |
| 511135 | Jul 6, 2001 | Jul 6, 2001 | Muirfield Exploration, Ltd. | Clay | Thornberry #34 | 2,000 | 07734826 |
| 507880 | Apr 17, 2001 | Apr 17, 2001 | Muirfield Exploration, Ltd. | Clay | Firestone, Tom #31 | 2,000 | 07734823 |
| 504149 | Jan 19, 2001 | Jan 19, 2001 | Muirfield Exploration, Ltd. | Clay | Taylor Estate, Etal #47 | 2,000 | 07734820 |
| 499883 | Sep 21, 2000 | Sep 21, 2000 | Muirfield Exploration, Ltd. | Clay | Firestone, Tom #29 | 2,000 | 07734815 |
| 499748 | Sep 18, 2000 | Sep 18, 2000 | Muirfield Exploration, Ltd. | Clay | Taylor Estate, Etal #46 | 2,000 | 07734814 |
| 493014 | Mar 13, 2000 | Mar 13, 2000 | Muirfield Exploration, Ltd. | Clay | Taylor Estate, Etal #45 | 2,000 | 07734808 |
| 488554 | Oct 15, 1999 | Oct 15, 1999 | Muirfield Exploration, Ltd. | Clay | Firestone, Tom #28 | 2,000 | 07734799 |
| 488553 | Oct 15, 1999 | Oct 15, 1999 | Muirfield Exploration, Ltd. | Clay | Firestone, Tom #27 | 2,000 | 07734798 |
| 485411 | Jun 23, 1999 | Jun 23, 1999 | Muirfield Exploration, Ltd. | Clay | Firestone, Tom #26 | 2,000 | 07734794 |
| 485410 | Jun 23, 1999 | Jun 23, 1999 | Muirfield Exploration, Ltd. | Clay | Firestone, Tom #25 | 2,000 | 07734793 |
| 485410Amendment | Jun 23, 1999 | Jun 23, 1999 | Muirfield Exploration, Ltd. | Clay | Firestone, Tom #25 | 2,000 | 07734793 |
| 483771 | Apr 19, 1999 | Apr 19, 1999 | Muirfield Exploration, Ltd. | Clay | Firestone, Tom #24 | 2,000 | 07734790 |
| 470167 | Nov 17, 1997 | Nov 17, 1997 | Muirfield Exploration, Ltd. | Clay | Thornberry #31 | 2,000 | 07734753 |
| 468184 | Sep 30, 1997 | Sep 30, 1997 | Muirfield Exploration, Ltd. | Clay | Saner-Lomax #149 | 2,000 | 07734750 |
| 467698 | Sep 17, 1997 | Sep 17, 1997 | Muirfield Exploration, Ltd. | Clay | Thornberry #33 | 2,000 | 07734748 |
| 462895 | May 30, 1997 | May 30, 1997 | Muirfield Exploration, Ltd. | Clay | Harrison & Allen #41 | 2,000 | 07734740 |
| 462894 | May 30, 1997 | May 30, 1997 | Muirfield Exploration, Ltd. | Clay | Joint #12 | 2,000 | 07734739 |
| 460219 | Mar 21, 1997 | Mar 21, 1997 | Muirfield Exploration, Ltd. | Clay | Joint #3 | 1,400 | 07734559 |
| 458728 | Feb 18, 1997 | Feb 18, 1997 | Muirfield Exploration, Ltd. | Clay | Harrison & Allen #40 | 2,000 | 07734727 |
| 458726 | Feb 18, 1997 | Feb 18, 1997 | Muirfield Exploration, Ltd. | Clay | Harrison & Allen #39 | 2,000 | 07734728 |
| 457276 | Jan 10, 1997 | Jan 10, 1997 | Muirfield Exploration, Ltd. | Clay | Harrison & Allen #38 | 2,000 | 07734726 |
| 457276Amendment | Jan 10, 1997 | Jan 10, 1997 | Muirfield Exploration, Ltd. | Clay | Harrison & Allen #38 | 2,000 | 07734726 |
| 457275 | Jan 10, 1997 | Jan 10, 1997 | Muirfield Exploration, Ltd. | Clay | Harrison & Allen #37 | 2,000 | 07734725 |
| 454218 | Nov 5, 1996 | Nov 5, 1996 | Muirfield Exploration, Ltd. | Clay | Joint #11 | 2,000 | 07734720 |
| 454219 | Oct 30, 1996 | Oct 30, 1996 | Muirfield Exploration, Ltd. | Clay | Joint #10 | 2,000 | 07734719 |
| 454217 | Oct 29, 1996 | Oct 29, 1996 | Muirfield Exploration, Ltd. | Clay | Harrison & Allen #36 | 2,000 | 07734718 |
| 452288 | Sep 4, 1996 | Sep 4, 1996 | Muirfield Exploration, Ltd. | Clay | Harrison & Allen #34 | 2,000 | 07734713 |
| 452287 | Sep 4, 1996 | Sep 4, 1996 | Muirfield Exploration, Ltd. | Clay | Harrison & Allen #35 | 2,000 | 07734714 |
| 448502 | May 24, 1996 | May 24, 1996 | Muirfield Exploration, Ltd. | Clay | Harrison & Allen #33 | 2,000 | 07734706 |
| 448501 | May 24, 1996 | May 24, 1996 | Muirfield Exploration, Ltd. | Clay | Harrison & Allen #31 | 2,000 | 07734705 |
| 448503 | May 21, 1996 | May 21, 1996 | Muirfield Exploration, Ltd. | Clay | Harrison & Allen #32 | 2,000 | 07734707 |
| 446828 | Apr 10, 1996 | Apr 10, 1996 | Muirfield Exploration, Ltd. | Clay | Harrison & Allen #30 | 2,000 | 07734693 |
| 445914 | Mar 14, 1996 | Mar 14, 1996 | Muirfield Exploration, Ltd. | Clay | Baber #9 | 2,000 | 07734689 |
| 442887 | Dec 15, 1995 | Dec 15, 1995 | Muirfield Exploration, Ltd. | Clay | Harrison & Allen #29 | 2,000 | 07734686 |
| 441110 | Oct 20, 1995 | Oct 20, 1995 | Muirfield Exploration, Ltd. | Clay | Allen #2 | 2,000 | 07734675 |
| 436510 | Jun 2, 1995 | Jun 2, 1995 | Muirfield Exploration, Ltd. | Clay | Joint #9 | 2,000 | 07734660 |
| 434977 | Apr 18, 1995 | Apr 18, 1995 | Muirfield Exploration, Ltd. | Clay | Taylor #1 | 4,000 | 07734654 |
| 434976 | Apr 18, 1995 | Apr 18, 1995 | Muirfield Exploration, Ltd. | Clay | Allen #1 | 2,000 | 07734655 |
| 434975 | Apr 18, 1995 | Apr 18, 1995 | Muirfield Exploration, Ltd. | Clay | Bates #1 | 2,000 | 07734656 |
| 434975Amendment | Apr 18, 1995 | Apr 18, 1995 | Muirfield Exploration, Ltd. | Clay | Bates #1 | 2,000 | 07734656 |
| 429209 | Oct 18, 1994 | Oct 18, 1994 | Muirfield Exploration, Ltd. | Clay | Whitaker #1 | 2,000 | 07734638 |
| 423762 | May 9, 1994 | May 9, 1994 | Muirfield Exploration, Ltd. | Clay | Joint #8 | 2,000 | 07734614 |
| 423500 | May 5, 1994 | May 5, 1994 | Muirfield Exploration, Ltd. | Clay | Joint #7 | 2,000 | 07734613 |
| 423499 | May 5, 1994 | May 5, 1994 | Muirfield Exploration, Ltd. | Clay | Joint #6 | 2,000 | 07734612 |
| 416552 | Oct 1, 1993 | Oct 1, 1993 | Muirfield Exploration, Ltd. | Clay | Joint #5 | 2,000 | 07734579 |
| 416551 | Oct 1, 1993 | Oct 1, 1993 | Muirfield Exploration, Ltd. | Clay | Harrison & Allen #28 | 1,000 | 07734577 |
| 416550 | Oct 1, 1993 | Oct 1, 1993 | Muirfield Exploration, Ltd. | Clay | Joint #4 | 2,000 | 07734578 |
| 412091 | May 24, 1993 | May 24, 1993 | Muirfield Exploration, Ltd. | Clay | Joint #3 | 1,400 | 07734559 |
| 412090 | May 24, 1993 | May 24, 1993 | Muirfield Exploration, Ltd. | Clay | Joint #2 | 1,400 | 07734560 |
| 412090Amendment | May 24, 1993 | May 24, 1993 | Muirfield Exploration, Ltd. | Clay | Joint #2 | 1,400 | 07734560 |
| 412089 | May 24, 1993 | May 24, 1993 | Muirfield Exploration, Ltd. | Clay | Joint #1 | 1,400 | 07734561 |
| 412089Amendment | May 24, 1993 | May 24, 1993 | Muirfield Exploration, Ltd. | Clay | Joint #1 | 1,400 | 07734561 |
| 406998 | Dec 22, 1992 | Dec 22, 1992 | Muirfield Exploration, Ltd. | Clay | Harrison & Allen #26 | 1,440 | 07720207 |
| 406998Amendment | Dec 22, 1992 | Dec 22, 1992 | Muirfield Exploration, Ltd. | Clay | Harrison & Allen #26 | 1,440 | 07720207 |