Senders: Sanborn, John W.
- John W. Sanborn to SLC, 21 January 1878 · UCLC41875 CU-MARK
- John W. Sanborn to SLC, 29 September 1879 · UCLC41876 Sanborn 1920
- John W. Sanborn to SLC, 8 November 1881 · UCLC41877 Sanborn 1920
- John W. Sanborn to SLC, 18 February 1882 · Perry, N.Y. · UCLC41031 CU-MARK
- John W. Sanborn to SLC, 3 March 1882 · UCLC41878 Sanborn 1920
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