Sources: CBev2
- SLC to Harper & Brothers, 23 January 1900 · London, England · UCCL09394
- SLC to Unidentified, 18 October 1900 · New York, N.Y · UCCL05878
- SLC to Effie McCoy, 8 September 1901 · Saranac Lake, N.Y · UCCL09396
- SLC to Katharine I. Harrison, 29 August 1902 · York Harbor, Me · UCCL09395
- SLC to Harry W. Dearborn, 13 May 1907 · Tuxedo Park, N.Y · UCCL07718
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