Sources: InFw2
- Samuel L. Clemens to Elisha Bliss, Jr., 9 March 1874 · Hartford, Conn · UCCL11969
- Samuel L. Clemens to Olivia L. Clemens, 3 July 1874 · Hartford, Conn · UCCL01105
- Samuel L. Clemens to Jane T. Bigelow, 26 October 1875 · Hartford, Conn · UCCL11672
- SLC to Bruce W. Munro, 21 October 1881 · Hartford, Conn · UCCL11682
- SLC to Karl Gerhardt, 21 September 1884 · Elmira, N.Y · UCCL00586
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