Addressees: Clemens, Olivia Susan (Susy)
- Samuel L. Clemens to Olivia Susan (Susy) Clemens, 9 May 1872 · Cleveland, Ohio · UCCL00746 CtHMTH
- Samuel L. Clemens to Olivia Susan (Susy) Clemens, 25 December 1875 · Hartford, Conn · UCCL01290 MoS2
- Samuel L. Clemens to Olivia Susan (Susy) Clemens, 16 July 1877 · New York, N.Y · UCCL01451
- Samuel L. Clemens to Olivia Susan (Susy) Clemens, 19 July 1877 · New York, N.Y · UCCL01455
- SLC to Susy (Olivia Susan) Clemens, 25 December 1881 · Hartford, Conn · UCCL10644 NN-BGC
- SLC to Susy (Olivia Susan) Clemens, 25 May 1882 · Hartford, Conn · UCCL09121 CCamarSJ
- SLC to Susy (Olivia Susan) Clemens, 23 November 1884 · New York, N.Y · UCCL03035 CU-MARK
- SLC to Susy (Olivia Susan) Clemens, 5 December 1884 · Utica, N.Y · UCCL03046 ViU
- SLC to Susy (Olivia Susan) Clemens, 14 December 1884 · Grand Rapids, Mich · UCCL03059 CU-MARK
- SLC to Susy (Olivia Susan) Clemens, 16 January 1885 · Chicago, Ill · UCCL03095 ViU
- SLC to Susy (Olivia Susan) Clemens, 23 January 1885 · St. Paul, Minn · UCCL03132 ViU
- SLC to Susy (Olivia Susan) Clemens, 3 February 1885 · Chicago, Ill · UCCL03151 ViU
- SLC to Susy (Olivia Susan) Clemens, 8 February 1885 · Indianapolis, Ind · UCCL03159 ViU
- SLC to Susy (Olivia Susan) Clemens, 15 February 1885 · Toronto, Canada · UCCL03168 ViU
- SLC to Susy (Olivia Susan) Clemens, 25 December 1886 · Hartford, Conn · UCCL12635
- SLC to Susy (Olivia Susan) Clemens, 16 July 1889 · Hartford, Conn · UCCL03912
- SLC to Susy (Olivia Susan) Clemens and Clara L. Clemens, 28 June 1891 · Aix-les-Bains, France · UCCL04216 CU-MARK
- SLC to Susy (Olivia Susan) Clemens and Clara L. Clemens, 29 June 1891 · Aix-les-Bains, France · UCCL04217 CU-MARK
- SLC, OLC to Susy (Olivia Susan) Clemens, 22 March 1892 · Menton, France · UCCL04276 CU-MARK
- SLC to Susy (Olivia Susan) Clemens, 24 March 1893 · SS Kaiser Wilhelm · UCCL11449 CU-MARK
- SLC to Susy (Olivia Susan) Clemens, 7 May 1893 · Elmira, N.Y · UCCL04397 CU-MARK
- SLC to Susy (Olivia Susan) Clemens, 6 November 1893 · New York, N.Y · UCCL04490 CU-MARK
- SLC to Susy (Olivia Susan) Clemens, 27 December 1893 · New York, N.Y · UCCL04540 CU-MARK
- SLC to Susy (Olivia Susan) Clemens, 8 August 1894 · New York, N.Y · UCCL04776 CLjC
- SLC to Olivia Susan (Susy) Clemens, 7 February 1896 · Calcutta, India · UCCL05018 CU-MARK
- SLC to Susy Clemens, unknown · UCCL13676
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