Sources: NHor2
- SLC to Karl Gerhardt, 18 July 1885 · Elmira, N.Y · UCCL03260
- SLC to Frances A. Ramsay, February–November 1901 · New York, N.Y · UCCL10791
- SLC to Frances A. Ramsay, 14 March 1901 · New York, N.Y · UCCL02798
- SLC to Frances A. Ramsay, 24 March 1901 · New York, N.Y · UCCL02804
- SLC to Frances A. Ramsay, 11 June 1901 · New York, N.Y · UCCL05948
- SLC per Isabel V. Lyon to Unidentified, 17 October 1907 · Tuxedo Park, N.Y · UCCL07855
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