| 506705 | Mar 20, 2001 | Mar 20, 2001 | Cross Timbers Operating Company | Prentice Northeast Unit #29944531951 | 7,450 |
| 506379 | Mar 13, 2001 | Mar 13, 2001 | Devon Energy Production Co, L.P. | North Welch Unit #2607HH44531949 | 5,000 |
| 506379Amendment | Mar 13, 2001 | Mar 13, 2001 | Devon Energy Production Co, L.P. | North Welch Unit #2607HH44531949 | 5,000 |
| 506378 | Mar 13, 2001 | Mar 13, 2001 | Devon Energy Production Co, L.P. | North Welch Unit #304HH44531950 | 5,000 |
| 506077 | Mar 8, 2001 | Mar 8, 2001 | Great Western Drlg. Co. | Geodyne #344531947 | 8,600 |
| 506076 | Mar 8, 2001 | Mar 8, 2001 | Great Western Drlg. Co. | Suntura #1A44531946 | 8,200 |
| 505705 | Feb 22, 2001 | Feb 22, 2001 | Devon Energy Production Co, L.P. | North Welch Unit #3301HH44500164 | 4,920 |
| 505463 | Feb 21, 2001 | Feb 21, 2001 | Chevron U. S. A. Inc. | Investors Royalty "A" #5244531945 | 8,200 |
| 505462 | Feb 21, 2001 | Feb 21, 2001 | Chevron U. S. A. Inc. | Investors Royalty "A" #5144531944 | 8,200 |
| 505302 | Feb 20, 2001 | Feb 20, 2001 | Great Western Drlg. Co. | Pool #244531943 | 8,200 |
| 504568Amendment | Jan 29, 2001 | Jan 29, 2001 | Devon Energy Production Co, L.P. | Gordon, M. G. #4944531948 | 7,700 |
| 504489 | Jan 26, 2001 | Jan 26, 2001 | Chevron U. S. A. Inc. | Investors Royalty "A" #5044531942 | 8,200 |
| 504488 | Jan 26, 2001 | Jan 26, 2001 | Chevron U. S. A. Inc. | Investors Royalty "A" #4944531941 | 8,200 |
| 504389 | Jan 25, 2001 | Jan 25, 2001 | Great Western Drlg. Co. | Suntura #544531940 | 8,500 |
| 503886 | Jan 11, 2001 | Jan 11, 2001 | Chevron U. S. A. Inc. | Investors Royalty "A" #4844531939 | 8,200 |
| 503445 | Jan 3, 2001 | Jan 3, 2001 | Trail Mountain, Inc. | Texland #244531937 | 8,500 |
| 503445Amendment | Jan 3, 2001 | Jan 3, 2001 | Trail Mountain, Inc. | Texland #244531937 | 8,500 |
| 503445Amendment | Jan 3, 2001 | Jan 3, 2001 | Trail Mountain, Inc. | Texland #244531937 | 8,500 |
| 503500 | Dec 29, 2000 | Dec 29, 2000 | Great Western Drlg. Co. | Geodyne #444531938 | 8,300 |
| 502924 | Dec 14, 2000 | Dec 14, 2000 | Chevron U. S. A. Inc. | Investors Royalty "A" #4744531936 | 8,200 |
| 502924Amendment | Dec 14, 2000 | Dec 14, 2000 | Chevron U. S. A. Inc. | Investors Royalty "A" #4744531936 | 8,200 |
| 502924Amendment | Dec 14, 2000 | Dec 14, 2000 | Chevron U. S. A. Inc. | Investors Royalty "A" #4744531936 | 8,200 |
| 502923 | Dec 14, 2000 | Dec 14, 2000 | Chevron U. S. A. Inc. | Investors Royalty "A" #4644531935 | 8,200 |
| 502681 | Dec 6, 2000 | Dec 6, 2000 | Gruy Petroleum Management Co. | Granbury #144531934 | 8,500 |
| 501587 | Nov 3, 2000 | Nov 3, 2000 | Trail Mountain, Inc. | Mabee #144531933 | 8,500 |
| 501587Amendment | Nov 3, 2000 | Nov 3, 2000 | Trail Mountain, Inc. | Mabee #144531933 | 8,500 |
| 500966 | Oct 20, 2000 | Oct 20, 2000 | Chevron U. S. A. Inc. | Mallet Land & Cattle Co #11944531931 | 8,200 |
| 500965 | Oct 20, 2000 | Oct 20, 2000 | Chevron U. S. A. Inc. | Mallet Land & Cattle Co #11844531932 | 8,200 |
| 500800 | Oct 17, 2000 | Oct 17, 2000 | Chevron U. S. A. Inc. | Mallet Land & Cattle Company #11744531930 | 8,200 |
| 500709 | Oct 13, 2000 | Oct 13, 2000 | Great Western Drlg. Co. | Suntura #444531929 | 8,200 |
| 498915 | Sep 1, 2000 | Sep 1, 2000 | Devon Energy Production Co, L.P. | North Welch Unit #604H44530649 | 4,933 |
| 498915Amendment | Sep 1, 2000 | Sep 1, 2000 | Devon Energy Production Co, L.P. | North Welch Unit #604HH44530649 | 4,928 |
| 498305 | Aug 10, 2000 | Aug 10, 2000 | Cross Timbers Operating Company | Prentice Northeast Unit #50244531928 | 7,425 |
| 498304 | Aug 10, 2000 | Aug 10, 2000 | Cross Timbers Operating Company | Prentice Northeast Unit #68444531927 | 7,125 |
| 497326 | Jul 31, 2000 | Jul 31, 2000 | Great Western Drlg. Co. | Suntura #344531921 | 8,200 |
| 497641 | Jul 26, 2000 | Jul 26, 2000 | Cross Timbers Operating Company | Prentice Northeast Unit #58444531925 | 7,365 |
| 497640 | Jul 26, 2000 | Jul 26, 2000 | Cross Timbers Operating Company | Prentice Northeast Unit #56444531924 | 7,420 |
| 497639 | Jul 26, 2000 | Jul 26, 2000 | Cross Timbers Operating Company | Prentice Northeast Unit #53244531923 | 7,365 |
| 497638 | Jul 26, 2000 | Jul 26, 2000 | Cross Timbers Operating Company | Prentice Northeast Unit #28044531922 | 7,440 |
| 497176 | Jul 19, 2000 | Jul 19, 2000 | Great Western Drlg. Co. | Geodyne #244531920 | 8,200 |
| 497229 | Jul 17, 2000 | Jul 17, 2000 | Landreth, Robert E. | Telford #108844531511 | 11,999 |
| 495615 | May 31, 2000 | May 31, 2000 | Trail Mountain, Inc. | Helen #544531919 | 8,500 |
| 495199 | May 23, 2000 | May 23, 2000 | Devon Energy Production Co, L.P. | Mallet Land & Cattle Company #110244531918 | 8,000 |
| 493276 | Mar 23, 2000 | Mar 23, 2000 | Cross Timbers Operating Company | Prentice Northeast Unit #55244531917 | 7,270 |
| 493275 | Mar 23, 2000 | Mar 23, 2000 | Cross Timbers Operating Company | Prentice Northeast Unit #58544531916 | 7,365 |
| 493274 | Mar 23, 2000 | Mar 23, 2000 | Cross Timbers Operating Company | Prentice Northeast Unit #29644531915 | 7,300 |
| 493273 | Mar 23, 2000 | Mar 23, 2000 | Cross Timbers Operating Company | Prentice Northeast Unit #53644531914 | 7,450 |
| 493271 | Mar 23, 2000 | Mar 23, 2000 | Cross Timbers Operating Company | Prentice Northeast Unit #57744531913 | 7,315 |
| 493154 | Mar 22, 2000 | Mar 22, 2000 | Great Western Drlg. Co. | Geodyne #144531911 | 8,200 |
| 493154Amendment | Mar 22, 2000 | Mar 22, 2000 | Great Western Drlg. Co. | Geodyne #144531911 | 8,200 |
| 493153 | Mar 22, 2000 | Mar 22, 2000 | Great Western Drlg. Co. | Pool #144531912 | 8,100 |
| 493106 | Mar 16, 2000 | Mar 16, 2000 | Chevron U. S. A. Inc. | Mallet Land & Cattle Company #11644531910 | 8,200 |
| 493105 | Mar 16, 2000 | Mar 16, 2000 | Chevron U. S. A. Inc. | First Natl Bank of Roswell Tr. B #2244531909 | 8,200 |
| 492441 | Mar 6, 2000 | Mar 6, 2000 | Chevron U. S. A. Inc. | Mallet Land & Cattle Company #11544531908 | 8,200 |
| 491482 | Mar 2, 2000 | Mar 2, 2000 | Wiser Oil Company, The | Wellman Unit #41044531825 | 10,500 |
| 492440 | Feb 25, 2000 | Feb 25, 2000 | Chevron U. S. A. Inc. | Mallet Land & Cattle Company #11444531907 | 8,200 |
| 491972 | Feb 17, 2000 | Feb 17, 2000 | R K Petroleum Corporation | Comanche #144531905 | 13,200 |
| 492119 | Feb 16, 2000 | Feb 16, 2000 | Trail Mountain, Inc. | Helen #444531906 | 8,300 |
| 491798 | Feb 14, 2000 | Feb 14, 2000 | Great Western Drlg. Co. | Suntura #244531904 | 8,100 |
| 491333 | Jan 21, 2000 | Jan 21, 2000 | Santa FE Snyder Corporation | Wellman, West Unit #3444531902 | 5,700 |
| 491332 | Jan 21, 2000 | Jan 21, 2000 | Santa FE Snyder Corporation | Wellman, West Unit #2444531903 | 5,700 |
| 491025 | Jan 19, 2000 | Jan 19, 2000 | Chevron U. S. A. Inc. | Investors Royalty "A" #4344531898 | 8,200 |
| 491024 | Jan 19, 2000 | Jan 19, 2000 | Chevron U. S. A. Inc. | Investors Royalty "A" #4444531896 | 8,200 |
| 491024Amendment | Jan 19, 2000 | Jan 19, 2000 | Chevron U. S. A. Inc. | Investors Royalty "A" #4444531896 | 8,200 |
| 491023 | Jan 19, 2000 | Jan 19, 2000 | Chevron U. S. A. Inc. | Investors Royalty "A" #4544531897 | 8,200 |
| 491022 | Jan 19, 2000 | Jan 19, 2000 | Chevron U. S. A. Inc. | Mallet Land & Cattle Company #11244531900 | 8,200 |
| 491021 | Jan 19, 2000 | Jan 19, 2000 | Chevron U. S. A. Inc. | Mallet Land & Cattle Company #11344531899 | 8,200 |
| 491146 | Jan 18, 2000 | Jan 18, 2000 | Santa FE Snyder Corporation | Wellman West Unit #2744531901 | 5,700 |
| 489910 | Jan 11, 2000 | Jan 11, 2000 | Wiser Oil Company, The | Wellman Unit #40944531456 | 10,500 |
| 489909 | Jan 11, 2000 | Jan 11, 2000 | Wiser Oil Company, The | Wellman Unit #40844531435 | 10,500 |
| 490810 | Jan 5, 2000 | Jan 5, 2000 | Great Western Drlg. Co. | Jacobson #3744531895 | 8,500 |
| 490740 | Jan 3, 2000 | Jan 3, 2000 | Great Western Drlg. Co. | Jacobson #3644531893 | 8,100 |
| 490774 | Dec 31, 1999 | Dec 31, 1999 | Santa FE Snyder Corporation | Wellman West Unit #3544531894 | 5,700 |
| 489816 | Dec 21, 1999 | Dec 21, 1999 | Arco Permian | Sims-Santa FE Snyder "4" #144531891 | 9,200 |
| 489816Amendment | Dec 21, 1999 | Dec 21, 1999 | Jones, L. E. Operating, Inc. | Sims Santa FE Snyder "4" #144531891 | 10,000 |
| 489824 | Dec 1, 1999 | Dec 1, 1999 | Chevron U. S. A. Inc. | Investors Royalty "A" #4244531892 | 8,200 |
| 488333 | Nov 8, 1999 | Nov 8, 1999 | Santa FE Snyder Corporation | Reynolds Gas Unit #144510238 | 3,550 |
| 488989 | Oct 29, 1999 | Oct 29, 1999 | Cross Timbers Operating Company | Prentice Northeast Unit #29544531890 | 7,400 |
| 488983 | Oct 29, 1999 | Oct 29, 1999 | Cross Timbers Operating Company | Prentice Northeast Unit #55544531889 | 7,360 |
| 488982 | Oct 29, 1999 | Oct 29, 1999 | Cross Timbers Operating Company | Prentice Northeast Unit #59444531888 | 7,450 |
| 488577 | Oct 29, 1999 | Oct 29, 1999 | Cross Timbers Operating Company | Prentice Northeast Unit #66744531723 | 7,100 |
| 488353 | Oct 11, 1999 | Oct 11, 1999 | Trail Mountain, Inc. | Helen #344531887 | 8,300 |
| 488353Amendment | Oct 11, 1999 | Oct 11, 1999 | Trail Mountain, Inc. | Helen #344531887 | 8,000 |
| 488291 | Oct 11, 1999 | Oct 11, 1999 | Chevron U. S. A. Inc. | Investors Royalty "A" #4144531886 | 8,200 |
| 488292 | Oct 8, 1999 | Oct 8, 1999 | Chevron U. S. A. Inc. | Mallet Land & Cattle Company #11144531885 | 8,200 |
| 487865 | Sep 29, 1999 | Sep 29, 1999 | Great Western Drlg. Co. | Suntura #144531884 | 8,000 |
| 487857 | Sep 27, 1999 | Sep 27, 1999 | Chevron U. S. A. Inc. | Mallet Land & Cattle Company #11044531883 | 8,200 |
| 486856 | Aug 23, 1999 | Aug 23, 1999 | Cross Timbers Operating Company | Prentice Northeast Unit #181HH44531311 | 6,719 |
| 486185 | Jul 27, 1999 | Jul 27, 1999 | Cross Timbers Operating Company | Prentice Northeast Unit #50744531882 | 7,360 |
| 486184 | Jul 27, 1999 | Jul 27, 1999 | Cross Timbers Operating Company | Prentice Northeast Unit #55744531881 | 7,360 |
| 486183 | Jul 27, 1999 | Jul 27, 1999 | Cross Timbers Operating Company | Prentice Northeast Unit #59244531880 | 7,360 |
| 486182 | Jul 27, 1999 | Jul 27, 1999 | Cross Timbers Operating Company | Prentice Northeast Unit #57544531879 | 7,360 |
| 486181 | Jul 27, 1999 | Jul 27, 1999 | Cross Timbers Operating Company | Prentice Northeast Unit #58244531878 | 7,360 |
| 484864 | Jun 2, 1999 | Jun 2, 1999 | Samson Lone Star LP | Seaton #144530641 | 12,001 |
| 484270 | May 3, 1999 | May 3, 1999 | Gruy Petroleum Management Co. | Lilly #244531877 | 9,000 |
| 482602 | Feb 10, 1999 | Feb 10, 1999 | Pennzoil Exploration & Prod. Co. | Mallet Land & Cattle Company #110144531876 | 8,300 |
| 482525 | Feb 8, 1999 | Feb 8, 1999 | Santa FE Energy Resources, Inc. | O.D.C. -47- Gas Unit #444510245 | 3,550 |
| 482319 | Jan 29, 1999 | Jan 29, 1999 | Chevron U. S. A. Inc. | Investors Royalty "A" #4044531875 | 8,900 |
| 480815 | Nov 12, 1998 | Nov 12, 1998 | R K Petroleum Corporation | Wilkes #144531874 | 8,700 |
| 478797 | Aug 25, 1998 | Aug 25, 1998 | Cross Timbers Operating Company | Prentice Northeast Unit #154H44531075 | 6,890 |