Sources: MoCoJ
- SLC to Laura C. Redden Searing, 16 April 1881 · Hartford, Conn · UCCL12040
- SLC to Laura C. Redden Searing, 6 May 1881 · Hartford, Conn · UCCL12039
- SLC to Julia J. Beecher, 2 July 1895 · Elmira, N.Y · UCCL04923
- SLC to W. L. Howard, 2 May 1901 · New York, N.Y · UCCL06051
- SLC to Richard H. Jesse, 14–19 April 1902 · Riverdale, N.Y · UCCL06322
- SLC to John L. Robards, 3 June 1902 · Hannibal, Mo · UCCL06354
- SLC to Richard H. Jesse, 20 October 1902 · Riverdale, N.Y · UCCL10875
- SLC to Homer Croy, 3 March 1906 · New York, N.Y · UCCL10874
- SLC to Champ Clark, 19 December 1906 · New York, N.Y · UCCL12369
- SLC to Champ Clark, 13 December 1907 · New York, N.Y · UCCL12368
- SLC to John L. Robards, 7 June 1908 · New York, N.Y · UCCL08025
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