Sources: NHor2
- SLC to Karl Gerhardt, 18 July 1885 · Elmira, N.Y · UCCL03260 NHor2
- SLC to Frances A. Ramsay, February–November 1901 · New York, N.Y · UCCL10791 NHor2
- SLC to Frances A. Ramsay, 14 March 1901 · New York, N.Y · UCCL02798 NHor2, NElmHi
- SLC to Frances A. Ramsay, 24 March 1901 · New York, N.Y · UCCL02804 NHor2, NElmHi
- SLC to Frances A. Ramsay, 11 June 1901 · New York, N.Y · UCCL05948 NHor2
- SLC per Isabel V. Lyon to Unidentified, 17 October 1907 · Tuxedo Park, N.Y · UCCL07855 NHor2
1