Sources: CL2
- Samuel L. Clemens to James Redpath, 11 April 1874 · Hartford, Conn · UCCL05322 CL2
- SLC to C. L. Lamb, 15 May 1882 · Hannibal, Mo · UCCL11494 CL2
- Charles L. Lamb to SLC, 15 May 1882 · Hannibal, Mo. · UCLC48350 CL2
- SLC to Joseph E. Hinds and Samuel Southey Hinds, September 1894 · Etretat, France · UCCL11492 CL2
- SLC to John Y. MacAlister, 24 March 1897 · London, England · UCCL11518 CL2
- SLC to Robert Barr, 29 September 1897 · Vienna, Austria · UCCL05293 CL2
- SLC to Lillian G. Kimball, 2 March 1902 · Riverdale, N.Y · UCCL12484 CL2
- SLC to Joseph E. Hinds, Unknown date · Unknown place · UCCL11493 CL2
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