| 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 |
| 1723 | 1848 January 12 | John Robinson | Hiram Sibley |
| 1724 | 1848 February 03 | John Robinson | Hiram Sibley |
| 1725 | 1848 February 07 | John Robinson | Hiram Sibley |
| 1726 | 1849 March 27 | John Robinson | Hiram Sibley |
| 1727 | 1850 June 26 | John Robinson | Hiram Sibley |
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