| 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 |
| 2237 | 1863 January 12 | John J. Speed | Hiram Sibley |
| 2238 | 1859 January 17 | John J. Speed | Hiram Sibley |
| 2239 | 1858 March 02 | John J. Speed | Hiram Sibley |
| 2240 | 1859 April 12 | John J. Speed | Hiram Sibley |
| 2241 | 1857 July 20 | John J. Speed | Hiram Sibley |
| 2242 | 1857 August 20 | John J. Speed | Hiram Sibley |
| 2243 | 1857 August 24 | John J. Speed | Hiram Sibley |
| 2244 | 1857 November 08 | John J. Speed | Hiram Sibley |
| 2245 | 1858 November 22 | John J. Speed | Hiram Sibley |
| 2246 | 1856 November 26 | John J. Speed | Hiram Sibley |
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