Sources: CtWep1
- Samuel L. Clemens to Elisha Bliss, Jr., 5 July 1868 · San Francisco, Calif · UCCL02739
- Samuel L. Clemens to James N. Gillis, 26 January 1870 · Elmira, N.Y · UCCL00416
- Samuel L. Clemens to Elisha Bliss, Jr., 20 May 1870 · Buffalo, N.Y · UCCL00465
- Samuel L. Clemens to Elisha Bliss, Jr., 29 October 1870 · Buffalo, N.Y · UCCL00517
- Samuel L. Clemens to Elisha Bliss, Jr., 2 December 1870 · Buffalo, N.Y · UCCL00548
- Samuel L. Clemens to Elisha Bliss, Jr., 22 December 1870 · Buffalo, N.Y · UCCL02785
- Samuel L. Clemens to Elisha Bliss, Jr., 19 October 1871 · Wilkes-Barre, Pa · UCCL00665
- Samuel L. Clemens to Francis E. Bliss, 26 May 1872 · Elmira, N. Y · UCCL00753
- Samuel L. Clemens to Isaac White, 22 April 1876 · Hartford, Conn · UCCL07692
- Samuel L. Clemens to Elisha Bliss, Jr., 6 August 1877 · Elmira, N.Y · UCCL01465
- Samuel L. Clemens to Francis E. Bliss, 10 June 1879 · Paris, France · UCCL01665
- Samuel L. Clemens to Francis E. Bliss, 13 June 1879 · Paris, France · UCCL01668
- Samuel L. Clemens to Francis E. Bliss, 15 June 1879 · Paris, France · UCCL01670
- Samuel L. Clemens to Francis E. Bliss, 17 June 1879 · Paris, France · UCCL01671
- Samuel L. Clemens to Francis E. Bliss, 6 September 1879 · Elmira, N.Y · UCCL01683
- Samuel L. Clemens to Francis E. Bliss, 16 September 1879 · Elmira, N.Y · UCCL01691
- Samuel L. Clemens to Francis E. Bliss, 8 May 1880 · Hartford, Conn · UCCL01801
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