| 490719 | Dec 29, 1999 | Dec 29, 1999 | Dreyfus, Louis Natural Gas Corp | Mayer 47 #10 | 8,350 | 43535042 |
| 490718 | Dec 29, 1999 | Dec 29, 1999 | Dreyfus, Louis Natural Gas Corp | Richardson 139 #8 | 7,600 | 43535041 |
| 490562 | Dec 21, 1999 | Dec 21, 1999 | Dreyfus, Louis Natural Gas Corp | Richardson 138 #13 | 8,400 | 43535034 |
| 490562Amendment | Dec 21, 1999 | Dec 21, 1999 | Dreyfus, Louis Natural Gas Corp | Richardson 138 #13 | 8,400 | 43535034 |
| 490322 | Dec 13, 1999 | Dec 13, 1999 | Dreyfus, Louis Natural Gas Corp | Pfluger 84 #14 | 5,550 | 43535033 |
| 490321 | Dec 13, 1999 | Dec 13, 1999 | Dreyfus, Louis Natural Gas Corp | Pfluger 103 #6 | 5,550 | 43535031 |
| 490320 | Dec 13, 1999 | Dec 13, 1999 | Dreyfus, Louis Natural Gas Corp | Fields 58 #4 | 6,800 | 43535032 |
| 490006 | Dec 2, 1999 | Dec 2, 1999 | Dreyfus, Louis Natural Gas Corp | Mayer #19 | 7,700 | 43535030 |
| 490005 | Dec 2, 1999 | Dec 2, 1999 | Dreyfus, Louis Natural Gas Corp | Mayer #20 | 8,800 | 43535029 |
| 489814 | Nov 24, 1999 | Nov 24, 1999 | Dreyfus, Louis Natural Gas Corp | Mayer 19 #5 | 8,550 | 43535028 |
| 488594 | Nov 23, 1999 | Nov 23, 1999 | Reliance Operating Company | Epps, H.C. #7039 | 6,600 | 43536714 |
| 489401 | Nov 10, 1999 | Nov 10, 1999 | Dreyfus, Louis Natural Gas Corp | Galbreath 80 #3 | 6,200 | 43535027 |
| 489400 | Nov 10, 1999 | Nov 10, 1999 | Dreyfus, Louis Natural Gas Corp | Mayer #16 | 8,400 | 43535026 |
| 489347 | Nov 9, 1999 | Nov 9, 1999 | Dreyfus, Louis Natural Gas Corp | Mayer #15 | 8,400 | 43535025 |
| 489345 | Nov 9, 1999 | Nov 9, 1999 | Dreyfus, Louis Natural Gas Corp | Mayer #18 | 7,750 | 43535024 |
| 489344 | Nov 9, 1999 | Nov 9, 1999 | Dreyfus, Louis Natural Gas Corp | Mayer #12 | 7,550 | 43535023 |
| 489343 | Nov 9, 1999 | Nov 9, 1999 | Dreyfus, Louis Natural Gas Corp | Mayer #14 | 8,550 | 43535022 |
| 489342 | Nov 9, 1999 | Nov 9, 1999 | Dreyfus, Louis Natural Gas Corp | Mayer #13 | 7,600 | 43535021 |
| 489341 | Nov 9, 1999 | Nov 9, 1999 | Dreyfus, Louis Natural Gas Corp | Mayer #17 | 8,500 | 43535020 |
| 489221 | Nov 8, 1999 | Nov 8, 1999 | EOG Resources, Inc. | Granger Bluff #4201 | 9,300 | 43535019 |
| 488950 | Oct 27, 1999 | Oct 27, 1999 | KCS Medallion Resources, Inc. | Miers A #8 | 5,600 | 43535018 |
| 488910 | Oct 27, 1999 | Oct 27, 1999 | KCS Medallion Resources, Inc. | Genini #3305 | 6,700 | 43535017 |
| 488909 | Oct 27, 1999 | Oct 27, 1999 | KCS Medallion Resources, Inc. | Miers A #1515 | 5,700 | 43535016 |
| 488381 | Oct 25, 1999 | Oct 25, 1999 | Concho Resources Inc. | Whitehead #203 | 9,000 | 43535010 |
| 488667 | Oct 19, 1999 | Oct 19, 1999 | Dreyfus, Louis Natural Gas Corp | Mayer, Edwin S. Jr. #22 | 8,100 | 43535015 |
| 488666 | Oct 19, 1999 | Oct 19, 1999 | Dreyfus, Louis Natural Gas Corp | Askew & Glimp 55 #8 | 6,100 | 43535014 |
| 488664 | Oct 19, 1999 | Oct 19, 1999 | Dreyfus, Louis Natural Gas Corp | Jones Ranch #1873 | 8,125 | 43535012 |
| 488665 | Oct 18, 1999 | Oct 18, 1999 | Dreyfus, Louis Natural Gas Corp | Galbreath 79 #4 | 6,200 | 43535013 |
| 488382 | Oct 18, 1999 | Oct 18, 1999 | Concho Resources Inc. | Whitehead #602 | 9,000 | 43534995 |
| 488455 | Oct 12, 1999 | Oct 12, 1999 | Dreyfus, Louis Natural Gas Corp | Espy 41 #10 | 6,000 | 43535001 |
| 488454 | Oct 12, 1999 | Oct 12, 1999 | Dreyfus, Louis Natural Gas Corp | Espy 56 #12 | 6,000 | 43534999 |
| 488453 | Oct 12, 1999 | Oct 12, 1999 | Dreyfus, Louis Natural Gas Corp | Espy 56 #13 | 6,050 | 43534998 |
| 488452 | Oct 12, 1999 | Oct 12, 1999 | Dreyfus, Louis Natural Gas Corp | Espy 57 #10 | 6,050 | 43535000 |
| 488451 | Oct 12, 1999 | Oct 12, 1999 | Dreyfus, Louis Natural Gas Corp | Mayer 19 #4 | 8,700 | 43535009 |
| 488450 | Oct 12, 1999 | Oct 12, 1999 | Dreyfus, Louis Natural Gas Corp | Espy 57 #11 | 6,050 | 43534997 |
| 488449 | Oct 12, 1999 | Oct 12, 1999 | Dreyfus, Louis Natural Gas Corp | Mayer 17 #3 | 8,350 | 43535008 |
| 488448 | Oct 12, 1999 | Oct 12, 1999 | Dreyfus, Louis Natural Gas Corp | Mayer 9 #2 | 8,450 | 43535007 |
| 488447 | Oct 12, 1999 | Oct 12, 1999 | Dreyfus, Louis Natural Gas Corp | Askew & Glimp 55 #7 | 6,050 | 43535006 |
| 488446 | Oct 12, 1999 | Oct 12, 1999 | Dreyfus, Louis Natural Gas Corp | Askew & Glimp 55 #6 | 6,050 | 43535005 |
| 488445 | Oct 12, 1999 | Oct 12, 1999 | Dreyfus, Louis Natural Gas Corp | Espy 40 #9 | 6,000 | 43535004 |
| 488444 | Oct 12, 1999 | Oct 12, 1999 | Dreyfus, Louis Natural Gas Corp | Richardson 4 #7 | 8,450 | 43535003 |
| 488443 | Oct 12, 1999 | Oct 12, 1999 | Dreyfus, Louis Natural Gas Corp | Espy 41 #9 | 6,000 | 43535002 |
| 488231 | Oct 8, 1999 | Oct 8, 1999 | Western Reserves Oil Company Inc | Pope "11" #1 | 4,800 | 43534996 |
| 488231Amendment | Oct 8, 1999 | Oct 8, 1999 | Western Reserves Oil Company Inc | Pope "11" #1 | 4,800 | 43534996 |
| 488220 | Oct 5, 1999 | Oct 5, 1999 | Dreyfus, Louis Natural Gas Corp | Richardson 4 #1R | 8,450 | 43532356 |
| 487934 | Sep 24, 1999 | Sep 24, 1999 | Dreyfus, Louis Natural Gas Corp | Richardson 139 #7 | 7,500 | 43534994 |
| 487933 | Sep 24, 1999 | Sep 24, 1999 | Dreyfus, Louis Natural Gas Corp | Mayfield 34 #3R | 8,500 | 43534993 |
| 487803 | Sep 22, 1999 | Sep 22, 1999 | Union Pacific Resources Company | Allison, Lea #4101HH | 5,279 | 43534731 |
| 487664 | Sep 16, 1999 | Sep 16, 1999 | Dreyfus, Louis Natural Gas Corp | Mayer 47 #6 | 8,450 | 43534992 |
| 487664Amendment | Sep 16, 1999 | Sep 16, 1999 | Dreyfus, Louis Natural Gas Corp | Mayer 47 #6 | 8,450 | 43534992 |
| 487663 | Sep 16, 1999 | Sep 16, 1999 | Dreyfus, Louis Natural Gas Corp | Bloodworth 139 #7 | 8,400 | 43534991 |
| 487579 | Sep 14, 1999 | Sep 14, 1999 | Dreyfus, Louis Natural Gas Corp | Mayer 1028 #1 | 7,450 | 43534985 |
| 487467 | Sep 10, 1999 | Sep 10, 1999 | Dreyfus, Louis Natural Gas Corp | Canyon Ranch #1311S | 5,500 | 43534982 |
| 487465 | Sep 10, 1999 | Sep 10, 1999 | Dreyfus, Louis Natural Gas Corp | Mayer 10 #3 | 7,700 | 43534984 |
| 487464 | Sep 10, 1999 | Sep 10, 1999 | Dreyfus, Louis Natural Gas Corp | Mayer 1 #3 | 8,500 | 43534983 |
| 487462 | Sep 10, 1999 | Sep 10, 1999 | Dreyfus, Louis Natural Gas Corp | Canyon Ranch #1073A | 5,500 | 43534987 |
| 487461 | Sep 10, 1999 | Sep 10, 1999 | Dreyfus, Louis Natural Gas Corp | Canyon Ranch #8312S | 5,500 | 43534990 |
| 487460 | Sep 10, 1999 | Sep 10, 1999 | Dreyfus, Louis Natural Gas Corp | Canyon Ranch #8303X | 5,400 | 43534989 |
| 487459 | Sep 10, 1999 | Sep 10, 1999 | Dreyfus, Louis Natural Gas Corp | Mayer 1 #4 | 8,500 | 43534988 |
| 487459Amendment | Sep 10, 1999 | Sep 10, 1999 | Dreyfus, Louis Natural Gas Corp | Mayer 1 #4 | 8,500 | 43534988 |
| 487458 | Sep 10, 1999 | Sep 10, 1999 | Dreyfus, Louis Natural Gas Corp | Canyon Ranch #8302X | 5,400 | 43534986 |
| 487242 | Sep 10, 1999 | Sep 10, 1999 | Dreyfus, Louis Natural Gas Corp | Jones Ranch #302 | 8,070 | 43534849 |
| 487239 | Sep 10, 1999 | Sep 10, 1999 | Dreyfus, Louis Natural Gas Corp | Mayer, Edwin S., Jr. "C" #102 | 8,025 | 43534480 |
| 487240 | Sep 8, 1999 | Sep 8, 1999 | Dreyfus, Louis Natural Gas Corp | Richardson 6 #5 | 8,401 | 43534898 |
| 487117 | Sep 3, 1999 | Sep 3, 1999 | Dreyfus, Louis Natural Gas Corp | Hill-Mayer, Edwin S., Jr. "B" #2 | 7,950 | 43534468 |
| 487153 | Sep 1, 1999 | Sep 1, 1999 | Dreyfus, Louis Natural Gas Corp | Fields 56 #5 | 6,050 | 43534980 |
| 487153Amendment | Sep 1, 1999 | Sep 1, 1999 | Dreyfus, Louis Natural Gas Corp | Fields 56 #5 | 6,050 | 43534980 |
| 487152 | Sep 1, 1999 | Sep 1, 1999 | Dreyfus, Louis Natural Gas Corp | Mayer "18" #4 | 8,450 | 43534979 |
| 487151 | Sep 1, 1999 | Sep 1, 1999 | Dreyfus, Louis Natural Gas Corp | Fields 21 #11 | 6,050 | 43534978 |
| 487150 | Sep 1, 1999 | Sep 1, 1999 | Dreyfus, Louis Natural Gas Corp | Hill-Mayer, Edwin S., Jr. "CC" #3 | 8,300 | 43534981 |
| 487014 | Aug 26, 1999 | Aug 26, 1999 | Gruy Petroleum Management Co. | Davis "C" #7R | 9,000 | 43534977 |
| 486983 | Aug 26, 1999 | Aug 26, 1999 | Rlo Partnership | Espy #2901 | 6,000 | 43500204 |
| 486969 | Aug 26, 1999 | Aug 26, 1999 | Talbott, Stan C. | Fields Estate #3 | 5,800 | 43534974 |
| 486935 | Aug 26, 1999 | Aug 26, 1999 | Dreyfus, Louis Natural Gas Corp | Bee County School Land #5 | 8,275 | 43534976 |
| 486934 | Aug 26, 1999 | Aug 26, 1999 | Dreyfus, Louis Natural Gas Corp | Mayer, Edwin S. Jr. #23 | 8,100 | 43534975 |
| 486930 | Aug 24, 1999 | Aug 24, 1999 | Dreyfus, Louis Natural Gas Corp | Richardson 138 #8 | 8,300 | 43534891 |
| 486831 | Aug 23, 1999 | Aug 23, 1999 | Kerns O & G, Inc. | Aldwell-McPherson #2 | 9,000 | 43534973 |
| 486772 | Aug 18, 1999 | Aug 18, 1999 | Dreyfus, Louis Natural Gas Corp | McMillan, Leo H. 108 #14 | 5,500 | 43534923 |
| 486662 | Aug 18, 1999 | Aug 18, 1999 | Dreyfus, Louis Natural Gas Corp | Fields 20 #11 | 6,150 | 43534972 |
| 486663 | Aug 16, 1999 | Aug 16, 1999 | Dreyfus, Louis Natural Gas Corp | Mayer 15 #7 | 8,250 | 43534971 |
| 486518 | Aug 16, 1999 | Aug 16, 1999 | Dreyfus, Louis Natural Gas Corp | Mayer, Edwin S., Jr. "D" #808 | 8,175 | 43534970 |
| 486398 | Aug 11, 1999 | Aug 11, 1999 | Dreyfus, Louis Natural Gas Corp | Hill-Mayer, Edwin S., Jr. Q #4 | 8,150 | 43534966 |
| 486525 | Aug 9, 1999 | Aug 9, 1999 | Dreyfus, Louis Natural Gas Corp | Pfluger 103 #7 | 5,550 | 43534968 |
| 486524 | Aug 9, 1999 | Aug 9, 1999 | Dreyfus, Louis Natural Gas Corp | Pfluger 103 #5 | 5,600 | 43534969 |
| 486447 | Aug 5, 1999 | Aug 5, 1999 | Dreyfus, Louis Natural Gas Corp | Fields 17 #15 | 6,050 | 43534967 |
| 486232 | Aug 2, 1999 | Aug 2, 1999 | Dreyfus, Louis Natural Gas Corp | Ward, John "A" #4 | 7,700 | 43534290 |
| 486098 | Aug 2, 1999 | Aug 2, 1999 | Dreyfus, Louis Natural Gas Corp | Hill-Mayer, Minnie H. "C" #3 | 8,200 | 43534505 |
| 485726 | Aug 2, 1999 | Aug 2, 1999 | Enron Oil & Gas Company | Holman "26" #1 | 7,400 | 43534960 |
| 485726Amendment | Aug 2, 1999 | Aug 2, 1999 | Enron Oil & Gas Company | Holman "26" #1 | 7,400 | 43534960 |
| 485726Amendment | Aug 2, 1999 | Aug 2, 1999 | EOG Resources, Inc. | Holman "26" #1 | 7,400 | 43534960 |
| 486101 | Jul 28, 1999 | Jul 28, 1999 | Dreyfus, Louis Natural Gas Corp | Hill-Mayer, Edwin S. Jr. "J" #3 | 8,058 | 43534455 |
| 486103 | Jul 26, 1999 | Jul 26, 1999 | Dreyfus, Louis Natural Gas Corp | Jones Ranch #1865 | 8,075 | 43534965 |
| 486102 | Jul 26, 1999 | Jul 26, 1999 | Dreyfus, Louis Natural Gas Corp | Hill-Mayer, Edwin S., Jr. "Z" #2 | 8,155 | 43534569 |
| 486099 | Jul 26, 1999 | Jul 26, 1999 | Dreyfus, Louis Natural Gas Corp | Mayer -36- #5 | 8,325 | 43534575 |
| 486131 | Jul 23, 1999 | Jul 23, 1999 | Dreyfus, Louis Natural Gas Corp | Jones Ranch #305 | 8,150 | 43534964 |
| 485895 | Jul 21, 1999 | Jul 21, 1999 | Dreyfus, Louis Natural Gas Corp | David 109 #12 | 5,550 | 43534963 |
| 485766 | Jul 15, 1999 | Jul 15, 1999 | Dreyfus, Louis Natural Gas Corp | Vanderstucken 81 #4 | 5,450 | 43534962 |
| 485688 | Jul 12, 1999 | Jul 12, 1999 | Dreyfus, Louis Natural Gas Corp | Hill-Mayer, Edwin S., Jr. "E" #4 | 8,075 | 43534919 |
| 485736 | Jul 8, 1999 | Jul 8, 1999 | Dreyfus, Louis Natural Gas Corp | Bloodworth 139 #8 | 8,400 | 43534961 |
| 485672 | Jul 6, 1999 | Jul 6, 1999 | Enron Oil & Gas Company | Granger Bluff #1101 | 9,300 | 43534959 |