| 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 |
| 24 | 1857 February 10 | Hiram O. Alden | Hiram Sibley |
| 25 | 1859 February 28 | Hiram O. Alden | Hiram Sibley |
| 26 | 1857 April 22 | Hiram O. Alden | Hiram Sibley |
| 27 | 1858 September 02 | Hiram O. Alden | John Dean Caton |
| 28 | 1858 September 16 | Hiram O. Alden | Hiram Sibley |
| 29 | 1858 October 05 | Hiram O. Alden | John Dean Caton |
| 30 | 1858 October 25 | Hiram O. Alden | Hiram Sibley |
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