Sources: CtWep1
- Samuel L. Clemens to Elisha Bliss, Jr., 5 July 1868 · San Francisco, Calif · UCCL02739 CtWep1
- Samuel L. Clemens to James N. Gillis, 26 January 1870 · Elmira, N.Y · UCCL00416 CtWep1
- Samuel L. Clemens to Elisha Bliss, Jr., 20 May 1870 · Buffalo, N.Y · UCCL00465 CtWep1
- Samuel L. Clemens to Elisha Bliss, Jr., 26 October 1870 · Buffalo, N.Y · UCCL00514 Axelrod, CtWep1
- Samuel L. Clemens to Elisha Bliss, Jr., 29 October 1870 · Buffalo, N.Y · UCCL00517 CtWep1
- Samuel L. Clemens to Elisha Bliss, Jr., 2 December 1870 · Buffalo, N.Y · UCCL00548 CtWep1
- Samuel L. Clemens to Elisha Bliss, Jr., 22 December 1870 · Buffalo, N.Y · UCCL02785 CtWep1
- Samuel L. Clemens to Elisha Bliss, Jr., 19 October 1871 · Wilkes-Barre, Pa · UCCL00665 CtWep1
- Samuel L. Clemens to Francis E. Bliss, 26 May 1872 · Elmira, N. Y · UCCL00753 CtWep1
- SLC to Unidentified, 21 June 1875 · Hartford, Conn · UCCL13244 CtWep1
- Samuel L. Clemens to Isaac White, 22 April 1876 · Hartford, Conn · UCCL07692 CtWep1
- Samuel L. Clemens to Elisha Bliss, Jr., 6 August 1877 · Elmira, N.Y · UCCL01465 CtWep1
- Samuel L. Clemens to Francis E. Bliss, 10 June 1879 · Paris, France · UCCL01665 CtWep1
- Samuel L. Clemens to Francis E. Bliss, 13 June 1879 · Paris, France · UCCL01668 CtWep1
- Samuel L. Clemens to Francis E. Bliss, 15 June 1879 · Paris, France · UCCL01670 CtWep1
- Samuel L. Clemens to Francis E. Bliss, 17 June 1879 · Paris, France · UCCL01671 CtWep1
- Samuel L. Clemens to Francis E. Bliss, 6 September 1879 · Elmira, N.Y · UCCL01683 CtWep1
- Samuel L. Clemens to Francis E. Bliss, 16 September 1879 · Elmira, N.Y · UCCL01691 CtWep1
- Samuel L. Clemens to Francis E. Bliss, 8 May 1880 · Hartford, Conn · UCCL01801 CtWep1
- SLC to Edith Beecher, March 1885 · Unknown place · UCCL12441 CtWep1
- SLC to William Winter, 5 November 1890 · Hartford, Conn · UCCL08604 CtWep1
- SLC to Frank Fuller, 4 August 1895 · Helena, Mont · UCCL04938 CtWep1
- SLC to Richard Watson Gilder, 12 March 1896 · Jaipur, India · UCCL05031 CtWep1
- SLC to Francis E. Bliss, 2 July 1897 · London, England · UCCL05249 CtWep1
- SLC to Francis E. Bliss, 11 February 1898 · Vienna, Austria · UCCL05348 CtWep1
- SLC to Francis E. (Frank) Bliss, May 1898 · Vienna or Kaltenleutgeben, Austria · UCCL05380 CtWep1
- SLC to James B. Pond, 17 June 1898 · Kaltenleutgeben, Austria · UCCL05401 CtWep1
- SLC to James M. Tuohy, 2 November 1898 · Vienna, Austria · UCCL05458 CCamarSJ, CtWep1
- SLC to James M. Tuohy, 30 October 1899 · London, England · UCCL05697 CCamarSJ, CtWep1
- SLC to James M. Tuohy, 4 November 1899 · London, England · UCCL05699 CCamarSJ, CtWep1
- SLC to James M. Tuohy, 19 December 1899 · London, England · UCCL05719 CCamarSJ, CtWep1
- SLC to Francis E. Bliss, August 1902 · York Harbor, Me · UCCL06396 CtWep1
- SLC to Mai H. Coe, 25 December 1906 · New York, N.Y · UCCL13142 CtWep1
- SLC to Edith Thompson, 21 April 1908 · New York, N.Y · UCCL13611 CtWep1
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