| 647710 | Oct 18, 2007 | Oct 18, 2007 | Killam Oil Co., Ltd. | Puig #6 | 12,000 | 47939960 |
| 647710Amendment | Oct 18, 2007 | Oct 18, 2007 | Killam Oil Co., Ltd. | Puig C #6 | 9,500 | 47939960 |
| 646186 | Oct 18, 2007 | Oct 18, 2007 | Conocophillips Company | Hein Trust #14 | 11,417 | 47937955 |
| 647505 | Oct 16, 2007 | Oct 16, 2007 | Rosetta Resources Operating LP | South Callaghan Ranch #279 | 8,500 | 47939956 |
| 647408 | Oct 12, 2007 | Oct 12, 2007 | Killam Oil Co., Ltd. | Killam Hurd McLean 121 #7 | 12,500 | 47939955 |
| 647408Amendment | Oct 12, 2007 | Oct 12, 2007 | Killam Oil Co., Ltd. | Killam Hurd McLean 121 #7 | 15,000 | 47939955 |
| 647336 | Oct 12, 2007 | Oct 12, 2007 | Mohican Oil & Gas, L.L.C. | Billings Heirs 1953 #1 | 10,000 | 47939954 |
| 647320 | Oct 12, 2007 | Oct 12, 2007 | Pogo Producing Company | Hereford, L.M. -T- #52 | 8,300 | 47939953 |
| 647219 | Oct 9, 2007 | Oct 9, 2007 | EOG Resources, Inc. | Jaral #7 | 12,500 | 47939952 |
| 646934 | Oct 9, 2007 | Oct 9, 2007 | St. Mary Land & Exploration Co. | Gates Ranch FGH #705 | 5,800 | 47939947 |
| 645786 | Oct 9, 2007 | Oct 9, 2007 | Conocophillips Company | Tex-Mex RR Co. 599 #6 | 10,000 | 47939936 |
| 645786Amendment | Oct 9, 2007 | Oct 9, 2007 | Conocophillips Company | Tex-Mex RR Co. 599 #6 | 10,000 | 47939936 |
| 647147 | Oct 8, 2007 | Oct 8, 2007 | Lewis Petro Properties, Inc. | Gates 1857 #28A | 6,700 | 47939950 |
| 647050 | Oct 8, 2007 | Oct 8, 2007 | Lewis Petro Properties, Inc. | Palafox Exploration Co. 2182 #37 | 7,200 | 47939951 |
| 647052 | Oct 5, 2007 | Oct 5, 2007 | Lewis Petro Properties, Inc. | Gates "N" TR5 #5 | 7,200 | 47939949 |
| 646974 | Oct 3, 2007 | Oct 3, 2007 | Lewis Petro Properties, Inc. | Cox 1047 #5 | 8,000 | 47939948 |
| 646920 | Oct 3, 2007 | Oct 3, 2007 | Lewis Petro Properties, Inc. | Webb County School Land 1383 #31 | 7,600 | 47939946 |
| 646914 | Oct 3, 2007 | Oct 3, 2007 | Lewis Petro Properties, Inc. | David Gonzalez, et al 100 B #6 | 8,000 | 47939945 |
| 646913 | Oct 3, 2007 | Oct 3, 2007 | Lewis Petro Properties, Inc. | David Gonzalez, et al 100 B #5 | 8,000 | 47939944 |
| 646347 | Sep 24, 2007 | Sep 24, 2007 | Rosetta Resources Operating LP | South Callaghan Ranch #278 | 9,900 | 47939943 |
| 646347Amendment | Sep 24, 2007 | Sep 24, 2007 | Rosetta Resources Operating LP | South Callaghan Ranch #278 | 9,900 | 47939943 |
| 646339 | Sep 24, 2007 | Sep 24, 2007 | Lewis Petro Properties, Inc. | Cox 1047 #2 | 8,000 | 47939942 |
| 646267 | Sep 24, 2007 | Sep 24, 2007 | EOG Resources, Inc. | Puig-Aviator #3 | 5,500 | 47939941 |
| 643389 | Sep 24, 2007 | Sep 24, 2007 | Killam Oil Co., Ltd. | Killam & Hurd Fee 1690 #4 | 11,000 | 47939903 |
| 646189 | Sep 20, 2007 | Sep 20, 2007 | Rosetta Resources Operating LP | South Callaghan Ranch #264 | 9,428 | 47939854 |
| 644652 | Sep 20, 2007 | Sep 20, 2007 | Chesapeake Operating, Inc. | Bruni Mineral Trust "A" #53 | 12,000 | 47939916 |
| 646120 | Sep 19, 2007 | Sep 19, 2007 | Rosetta Resources Operating LP | South Callaghan Ranch #277 | 7,100 | 47939940 |
| 644540 | Sep 19, 2007 | Sep 19, 2007 | Killam Oil Co., Ltd. | Garcia 608 #2 | 11,815 | 47938954 |
| 645994 | Sep 17, 2007 | Sep 17, 2007 | Conocophillips Company | Lundell CP #1201 | 350 | 47939939 |
| 645900 | Sep 14, 2007 | Sep 14, 2007 | Laredo Energy | Vergara #2 | 11,000 | 47939938 |
| 645827 | Sep 14, 2007 | Sep 14, 2007 | Pogo Producing Company | Hereford, L.M. -B- #54 | 8,800 | 47939937 |
| 645827Amendment | Sep 14, 2007 | Sep 14, 2007 | OXY USA Inc. | Hereford, L.M. -B- #54 | 8,290 | 47939937 |
| 645796 | Sep 14, 2007 | Sep 14, 2007 | Chevron U. S. A. Inc. | Malakoff, M. E. #4 | 6,500 | 47936354 |
| 645757 | Sep 12, 2007 | Sep 12, 2007 | Lewis Petro Properties, Inc. | Palafox Exploration Co. 876 #18 | 7,200 | 47939935 |
| 645755 | Sep 12, 2007 | Sep 12, 2007 | Killam Oil Co., Ltd. | Killam and Hurd Fee 1496 #1 | 8,500 | 47939934 |
| 643036 | Sep 11, 2007 | Sep 11, 2007 | Enterprise Products Operating LP | South Texas Border #S 85TB | 500 | 47939933 |
| 645667 | Sep 10, 2007 | Sep 10, 2007 | Lewis Petro Properties, Inc. | Briscoe-Manry 1393 #2 | 8,000 | 47939932 |
| 645661 | Sep 10, 2007 | Sep 10, 2007 | Lewis Petro Properties, Inc. | Palafox Exploration Co. #33 | 7,200 | 47939931 |
| 645632 | Sep 7, 2007 | Sep 7, 2007 | St. Mary Land & Exploration Co. | Gates Ranch D #2289 | 5,800 | 47939930 |
| 645600 | Sep 7, 2007 | Sep 7, 2007 | EOG Resources, Inc. | Benavides F. M. T. #11HH | 12,000 | 47939929 |
| 645210 | Sep 6, 2007 | Sep 6, 2007 | St. Mary Land & Exploration Co. | Gates 05S #9287 | 5,800 | 47939924 |
| 645469 | Sep 5, 2007 | Sep 5, 2007 | Rosetta Resources Operating LP | South Callaghan Ranch #276 | 8,400 | 47939928 |
| 645424 | Sep 5, 2007 | Sep 5, 2007 | Lewis Petro Properties, Inc. | Owen Briscoe 1133 #6 | 8,000 | 47939927 |
| 645248 | Sep 4, 2007 | Sep 4, 2007 | EOG Resources, Inc. | Billings Ranch #1HH | 13,000 | 47939925 |
| 645248Amendment | Sep 4, 2007 | Sep 4, 2007 | EOG Resources, Inc. | Billings Ranch #1HH | 13,000 | 47939925 |
| 645301 | Aug 31, 2007 | Aug 31, 2007 | Conocophillips Company | Bruni Ranch #109 | 11,600 | 47939926 |
| 645189 | Aug 30, 2007 | Aug 30, 2007 | EOG Resources, Inc. | La Purisima Ranch #3 | 10,000 | 47939923 |
| 644558 | Aug 29, 2007 | Aug 29, 2007 | Rosetta Resources Operating LP | South Callaghan Ranch #275 | 8,950 | 47939914 |
| 645031 | Aug 28, 2007 | Aug 28, 2007 | Conocophillips Company | Benavides, Rosa V. A #111 | 9,750 | 47939922 |
| 645028 | Aug 28, 2007 | Aug 28, 2007 | Conocophillips Company | Vaquillas Ranch D #223 | 12,600 | 47939921 |
| 645023 | Aug 28, 2007 | Aug 28, 2007 | Conocophillips Company | Warren, W. K. #5 | 10,600 | 47939920 |
| 645022 | Aug 28, 2007 | Aug 28, 2007 | Lewis Petro Properties, Inc. | Owen 3 #3 | 7,450 | 47939919 |
| 645010 | Aug 28, 2007 | Aug 28, 2007 | Virtex Petroleum Company, Inc. | Manry 2292 #14 | 7,800 | 47939918 |
| 645002 | Aug 27, 2007 | Aug 27, 2007 | Virtex Petroleum Company, Inc. | Manry 2292 #13 | 7,800 | 47939917 |
| 644945 | Aug 24, 2007 | Aug 24, 2007 | St. Mary Land & Exploration Co. | Gates Ranch "Y" #207 | 5,800 | 47939915 |
| 644486 | Aug 21, 2007 | Aug 21, 2007 | Cox, Martin Regan | Armstrong Ranch 'B' #2 | 11,491 | 47936032 |
| 644484 | Aug 21, 2007 | Aug 21, 2007 | Cox, Martin Regan | Armstrong Ranch 'A' #1 | 15,142 | 47934299 |
| 644531 | Aug 17, 2007 | Aug 17, 2007 | Pogo Producing Company | Hereford, L. M. -A- #53 | 8,800 | 47939913 |
| 644377 | Aug 16, 2007 | Aug 16, 2007 | Kerr-McGee Oil & Gas Onshore LP | McKendrick #8 | 9,500 | 47936061 |
| 644287 | Aug 16, 2007 | Aug 16, 2007 | EOG Resources, Inc. | Cabezon #10HH | 11,000 | 47939912 |
| 644265 | Aug 16, 2007 | Aug 16, 2007 | Killam Oil Co., Ltd. | K&H Fee 2042 #8 | 11,500 | 47939911 |
| 644264 | Aug 15, 2007 | Aug 15, 2007 | Killam Oil Co., Ltd. | K&H Fee 1859 #5 | 10,500 | 47939910 |
| 644224 | Aug 14, 2007 | Aug 14, 2007 | Laredo Energy | Martin, S. J. "A" #1 | 13,000 | 47939909 |
| 644224Amendment | Aug 14, 2007 | Aug 14, 2007 | Laredo Energy | Martin, S. J. "A" #1 | 13,000 | 47939909 |
| 644198 | Aug 14, 2007 | Aug 14, 2007 | Lewis Petro Properties, Inc. | Palafox Exploration Co. #28 | 7,200 | 47939908 |
| 644012 | Aug 14, 2007 | Aug 14, 2007 | San Isidro Development Co, L. C. | C. H. Ramirez Minerals, Ltd B #1 | 8,500 | 47939907 |
| 643936 | Aug 10, 2007 | Aug 10, 2007 | Lewis Petro Properties, Inc. | Saunders 108 #9 | 7,200 | 47939906 |
| 643846 | Aug 8, 2007 | Aug 8, 2007 | Rosetta Resources Operating LP | South Callaghan Ranch #274 | 9,500 | 47939905 |
| 643607 | Aug 8, 2007 | Aug 8, 2007 | Rosetta Resources Operating LP | South Callaghan Ranch #226 | 8,677 | 47938617 |
| 643536 | Aug 7, 2007 | Aug 7, 2007 | Rosetta Resources Operating LP | South Callaghan Ranch #273 | 8,400 | 47939904 |
| 643498 | Aug 7, 2007 | Aug 7, 2007 | Rosetta Resources Operating LP | South Callaghan Ranch #255 | 9,070 | 47939751 |
| 643237 | Aug 4, 2007 | Aug 4, 2007 | U.S. Enercorp, Ltd. | Stroman-Armstrong #6 | 14,500 | 47939902 |
| 643237Amendment | Aug 4, 2007 | Aug 4, 2007 | U.S. Enercorp, Ltd. | Stroman-Armstrong #6 | 14,700 | 47939902 |
| 643110 | Aug 2, 2007 | Aug 2, 2007 | Rosetta Resources Operating LP | South Callaghan Ranch #263 | 9,040 | 47939804 |
| 643080 | Aug 2, 2007 | Aug 2, 2007 | Rosetta Resources Operating LP | Barnes #5 | 8,600 | 47939901 |
| 643024 | Aug 1, 2007 | Aug 1, 2007 | Rosetta Resources Operating LP | A. Barnes #1 | 8,600 | 47939900 |
| 642802 | Jul 31, 2007 | Jul 31, 2007 | EOG Resources, Inc. | Slator Ranch #Z 1 | 11,900 | 47939898 |
| 642802Amendment | Jul 31, 2007 | Jul 31, 2007 | EOG Resources, Inc. | Slator Ranch #Z 1 | 11,900 | 47939898 |
| 642766 | Jul 30, 2007 | Jul 30, 2007 | Killam Oil Co., Ltd. | K&H Fee 942 #4 | 11,500 | 47939897 |
| 642708 | Jul 30, 2007 | Jul 30, 2007 | Conocophillips Company | Frost Trust 49 #3 | 10,650 | 47939896 |
| 642396 | Jul 26, 2007 | Jul 26, 2007 | Conocophillips Company | Dix Ranch C 100 #5 | 7,850 | 47939895 |
| 643165 | Jul 25, 2007 | Jul 25, 2007 | Lewis Petro Properties, Inc. | Briscoe-Manry 1393 #1 | 8,000 | 47939899 |
| 640491 | Jul 25, 2007 | Jul 25, 2007 | Killam Oil Co., Ltd. | Garcia 608 #4 | 12,500 | 47939325 |
| 640491Amendment | Jul 25, 2007 | Jul 25, 2007 | Killam Oil Co., Ltd. | Garcia 608 #4 | 12,200 | 47939325 |
| 642176 | Jul 18, 2007 | Jul 18, 2007 | Lewis Petro Properties, Inc. | Cox 1047 #1 | 8,000 | 47939893 |
| 642161 | Jul 18, 2007 | Jul 18, 2007 | Killam Oil Co., Ltd. | Killam & Hurd Fee Porcion 16 #4 | 6,000 | 47939892 |
| 641858 | Jul 18, 2007 | Jul 18, 2007 | St. Mary Land & Exploration Co. | Brask Ranch #28 | 5,800 | 47939894 |
| 642105 | Jul 17, 2007 | Jul 17, 2007 | St. Mary Land & Exploration Co. | Petty Ranch #1312 | 5,600 | 47939891 |
| 642018 | Jul 16, 2007 | Jul 16, 2007 | EOG Resources, Inc. | Staggs #10HH | 13,000 | 47939890 |
| 641976 | Jul 16, 2007 | Jul 16, 2007 | Virtex Petroleum Company, Inc. | Manry 2292 #12 | 7,800 | 47939889 |
| 641832 | Jul 16, 2007 | Jul 16, 2007 | Rosetta Resources Operating LP | South Callaghan Ranch #272 | 9,000 | 47939885 |
| 641832Amendment | Jul 16, 2007 | Jul 16, 2007 | Rosetta Resources Operating LP | South Callaghan Ranch #272 | 8,473 | 47939885 |
| 641832Amendment | Jul 16, 2007 | Jul 16, 2007 | Rosetta Resources Operating LP | South Callaghan Ranch #272 | 8,500 | 47939885 |
| 641926 | Jul 14, 2007 | Jul 14, 2007 | Virtex Petroleum Company, Inc. | Manry 2292 #11 | 7,800 | 47939888 |
| 641926Amendment | Jul 14, 2007 | Jul 14, 2007 | Virtex Petroleum Company, Inc. | Manry 2292 #11 | 7,800 | 47939888 |
| 641893 | Jul 14, 2007 | Jul 14, 2007 | Virtex Petroleum Company, Inc. | Manry 2292 #10 | 7,800 | 47939887 |
| 641841 | Jul 14, 2007 | Jul 14, 2007 | Conocophillips Company | BMT #154 | 11,000 | 47939886 |
| 641833 | Jul 14, 2007 | Jul 14, 2007 | Lewis Petro Properties, Inc. | David Gonzalez, et al 100 B #9 | 8,000 | 47939884 |
| 641755 | Jul 13, 2007 | Jul 13, 2007 | Middleton Oil Company | Middleton, Triphene #2801 | 7,000 | 47939883 |
| 641669 | Jul 12, 2007 | Jul 12, 2007 | Killam Oil Co., Ltd. | Vaquillas Borrego #27 | 11,000 | 47939882 |