Sources: NBuBE
- SLC to Charles E. West, 18 June 1883 · Elmira, N.Y · UCCL01686
- SLC to James Fraser Gluck, 12 November 1885 · Hartford, Conn · UCCL03305
- SLC to Unidentified, 7 March 1891 · Hartford, Conn · UCCL04179
- SLC to Charles M. Underhill, 14 April 1893 · Chicago, Ill · UCCL04374
- SLC to Charles M. Underhill, ca 20–22 April 1893 · Chicago, Ill · UCCL13300
- SLC to Unidentified, 4 June 1909, Redding, Conn · UCCL13453
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