Addressees: Twichell, Joseph H
- Samuel L. Clemens to Joseph H. and Harmony C. Twichell, 18 November 1868 · Cleveland, Ohio · UCCL02765
- Samuel L. Clemens to Joseph H. Twichell, 28 November 1868 · New York, N.Y · UCCL02769
- Samuel L. Clemens to Joseph H. Twichell, 12 December 1868 · Norwich, N.Y · UCCL02729
- Samuel L. Clemens to Joseph H. Twichell, 1 January 1869 · Cleveland, Ohio · UCCL00216
- Samuel L. Clemens to Joseph H. Twichell and Family, 23 January 1869 · Cleveland, Ohio · UCCL00240
- Samuel L. Clemens to Joseph H. Twichell and Family, 14 February 1869 · Ravenna, Ohio · UCCL00252
- Samuel L. Clemens to Joseph H. Twichell, 28 December 1869 · New York, N.Y · UCCL00395
- Samuel L. Clemens to Joseph H. Twichell, per Telegraph Operator, 28–31 January 1870 · Elmira, N.Y · UCCL02796
- Samuel L. Clemens to Joseph H. and Harmony C. Twichell, 12 November 1870 · Buffalo, N.Y · UCCL00533
- Samuel L. Clemens to Joseph H. Twichell, 19 December 1870 · Buffalo, N.Y · UCCL02783
- Samuel L. Clemens to Joseph H. Twichell, 3 January 1871 · Buffalo, N.Y · UCCL00554
- Samuel L. Clemens to Joseph H. and Harmony C. Twichell, 19–22 March 1872 · Elmira, N.Y · UCCL00735
- Samuel L. Clemens to Joseph L. Twichell, 20–22 December · Hartford, Conn · UCCL00848
- Samuel L. and Olivia L. Clemens to Joseph H. Twichell, 29 June 1873 · London, England · UCCL00936
- Samuel L. Clemens to Joseph H. Twichell, 5 January 1874 · London, England · UCCL01032
- Samuel L. Clemens to Joseph H. Twichell and Elisabeth G. (Lilly) Warner, 14 April 1874 · Hartford, Conn · UCCL11145
- Samuel L. Clemens to Joseph H. and Harmony C. Twichell, 11 June 1874 · Elmira, N.Y · UCCL01097
- Samuel L. Clemens to Joseph H. Twichell, 29? July 1874 · Elmira, N.Y · UCCL01113
- Samuel L. Clemens to Joseph H. Twichell, 29 or 30 December 1875 · Hartford, Conn · UCCL01291
- Samuel L. Clemens to Joseph H. Twichell, 29 January 1876 · Hartford, Conn · UCCL12941
- Samuel L. Clemens to Joseph H. Twichell, 25 December 1876 · Hartford, Conn · UCCL11343
- Samuel L. Clemens to Joseph H. Twichell, 27 June 1877 · Elmira, N.Y · UCCL01444
- Samuel L. Clemens to Joseph H. Twichell, 10 April 1878 · Elmira, N.Y · UCCL01554
- Samuel L. Clemens to Joseph H. Twichell and George P. Bissell, 23 May 1878 · Heidelberg, Germany · UCCL10474
- Samuel L. and Olivia L. Clemens to Joseph H. Twichell, 9 September 1878 · Geneva, Switzerland · UCCL02800
- Samuel L. Clemens to Joseph H. Twichell, 3 November 1878 · Rome, Italy · UCCL01603
- Samuel L. Clemens to Joseph H. Twichell and Susan L. Warner, 20 November 1878 · Munich, Germany · UCCL01608
- Samuel L. Clemens to Joseph H. Twichell, 23 January 1879 · Munich, Germany · UCCL01624
- Samuel L. Clemens to Joseph H. Twichell, 26 January 1879 · Munich, Germany · UCCL01577
- Samuel L. Clemens to Joseph H. Twichell, 24 February 1879 · Munich, Germany · UCCL01292
- Samuel L. Clemens to Joseph H. Twichell, 10 June 1879 · Paris, France · UCCL01666
- Samuel L. Clemens to Joseph H. Twichell, 2 October 1879 · Elmira, N.Y · UCCL01696
- Samuel L. Clemens to Joseph H. Twichell, 16 March 1880 · Hartford, Conn · UCCL01771
- Samuel L. Clemens to Joseph H. Twichell, 24 March 1880 · Hartford, Conn · UCCL09197
- Samuel L. Clemens to Joseph H. Twichell, 19 July 1880 · Elmira, N.Y · UCCL12758
- Samuel L. Clemens to Joseph H. Twichell, 29 August 1880 · Elmira, N.Y · UCCL01827
- Samuel L. Clemens to Joseph H. Twichell, per Telegraph Operator, 14 October 1880 · Boston, Mass · UCCL01841
- SLC to Joseph H. Twichell, 16 February 1881 · Hartford, Conn · UCCL01909
- SLC to Joseph H. Twichell, 9 October 1881 · Hartford, Conn · UCCL12777
- SLC to Joseph H. Twichell, 18? February 1882 · Hartford, Conn · UCCL02132
- SLC to Joseph H. Twichell, 19 September 1882 · Elmira, N.Y · UCCL02271
- SLC to Joseph H. Twichell, 20 July 1883 · Elmira, N.Y · UCCL09080
- SLC to Joseph H. Twichell, 16 September 1884 · Elmira, N.Y · UCCL01327
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