Addressees: Langdon, Ida C
- SLC to Jervis Langdon II, Julia O. Langdon, and Ida Langdon, 28 December 1885 · Hartford, Conn · UCCL03346 CU-MARK
- SLC to Ida Langdon, 11 May 1893 · New York, N.Y · UCCL04401 CtHMTH
- SLC to Ida C. Langdon, 31 March 1901 · New York, N.Y · UCCL06031 CU-MARK
- SLC to Ida Langdon, 24 December 1901 · Riverdale, N.Y · UCCL06195 CtHMTH
- SLC to Ida Langdon, 28 August 1902 · York Harbor, Me · UCCL06418 CtHMTH
- SLC to Ida Langdon, 27 September 1902 · York Harbor, Me · UCCL06446 CU-MARK
- SLC to Ida Langdon, 22 September 1904 · New York, N.Y · UCCL11275 CtHMTH
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