Senders: Langdon, J.
- Theodore W. Crane for J. Langdon to SLC, 3 July 1874 · Elmira, N.Y. · UCLC32015 CU-MARK
- J. D. F. Slee for J. Langdon to SLC, 23 March 1878 · Elmira, N.Y. · UCLC32672 CU-MARK
- Theodore W. Crane for J. Langdon to SLC, 7 August 1878 · Elmira, N.Y. · UCLC38370 CU-MARK
- Theodore W. Crane for J. Langdon to SLC, 14 September 1887 · Elmira, N.Y. · UCLC43763 CU-MARK
- J. Langdon and C. L. Stillman to SLC, 3 July 1890 · Elmira, N.Y. · UCLC45154 CU-MARK
- J. Langdon and C. L. Stillman to SLC, 1 August 1890 · Elmira, N.Y. · UCLC45185 CU-MARK
- C. L. Stillman for J. Langdon to SLC, 1 September 1890 · Elmira, N.Y. · UCLC45216 CU-MARK
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