Addressees: Ellsworth, William W
- SLC to William W. Ellsworth, 13 January 1893 · Florence, Italy · UCCL04325
- SLC to William W. Ellsworth, 15 September 1893 · New York, N.Y · UCCL11341
- SLC to William W. Ellsworth, November 1900 · New York, N.Y · UCCL09345
- SLC to William W. Ellsworth, 2 November 1900 · New York, N.Y · UCCL05894
- SLC to William Ellsworth, 18 November 1900 * Princeton, N.J · UCCL13339
- SLC to William W. Ellsworth, 15 October 1901 · Riverdale, N.Y · UCCL06157
- SLC to William W. Ellsworth, 31 January 1902 · Riverdale, N.Y · UCCL12007
- SLC to William W. Ellsworth, 21 June 1903 · Unknown place · UCCL03002
- SLC to William W. Ellsworth, 1 September 1903 · Elmira, N.Y · UCCL12008
- IVL for Samuel L. Clemens to William W. Ellsworth, 5 September 1907 · Tuxedo Park, N.Y · UCCL07829
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