Sources: TxAu3
- Samuel L. Clemens to James Redpath and George L. Fall, 11 October 1871 · Hartford, Conn · UCCL00659
- Samuel L. Clemens to James Redpath and George L. Fall per Telegraph Operator, 8 December 1871 · Buffalo, N.Y · UCCL00687
- Samuel L. Clemens to Ira F. Hart, per Olivia L. Clemens, 12 January 1873 · Hartford, Conn · UCCL00855
- Samuel L. Clemens to James Redpath, 1 February 1874 · Hartford, Conn · UCCL01043
- Samuel L. Clemens to Cashier, First National Bank of Hartford, 04 February 1876 · Hartford, Conn · UCCL12995
- SLC to Unidentified, 17 April 1876 · Hartford, Conn · UCCL13785
- SLC to the American Publishing Co. · 17 April 1877 · Hartford, Conn · UCCL09794
- Samuel L. Clemens to Matthew H. Bartlett, October 1877 · 2nd of 2 · Hartford, Conn · UCCL11172
- Samuel L. Clemens to Andrew Chatto, 21 January 1878 · Hartford, Conn · UCCL02324
- Samuel L. Clemens to Joseph Blackburn Jones, 30 October 1879 · Hartford, Conn · UCCL12006
- SLC to Robert Chaffee Morgan, 14-27 1881 · Hartford or Branford, Conn · UCCL13650
- SLC to Karl and Hattie J. Gerhardt, 26 June 1881 · Branford, Conn · UCCL01978
- SLC to Andrew Chatto, 1 March 1883 · Hartford, Conn · UCCL12923
- Samuel L. Clemens to Henry (Harry) M. Clarke, 119 July 1883 · 2nd of 2 · Elmira, N.Y · UCCL13226
- Samuel L. Clemens to Henry (Harry) M. Clarke, 1–19 July 1883 · 1st of 2 · Elmira, N.Y · UCCL13225
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