| Results | |||
| Note: A ? indicates the information presented is a 'best guess'. The information on the original letter is unknown or illegible and may not be completely accurate. | |||
| Letter Number | Letter Date | Written By | Written To |
| 1977 | 1861 March 15 | A. H. Sibley | Hiram Sibley |
| 1978 | 1860 June 21 | A. H. Sibley | Hiram Sibley |
| 1979 | 1860 July 26 | A. H. Sibley | Hiram Sibley |
| 1980 | 1861 August 05 | A. H. Sibley | Hiram Sibley |
| 1981 | 1861 August 08 | A. H. Sibley | Hiram Sibley |
| 1982 | 1860 August 24 | A. H. Sibley | Hiram Sibley |
| 1983 | 1861 September 20 | A. H. Sibley | Hiram Sibley |
| 1984 | 1861 October 15 | A. H. Sibley | Hiram Sibley |
| 1985 | 1861 December 03 | A. H. Sibley | Hiram Sibley |
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