Sources: NjP
- Samuel L. Clemens to James R. Osgood, 31 March 1872 · Elmira, N.Y · UCCL00739 NjP
- SLC to Henry Lee, 19 October 1872 (2nd of 2) · London, England · UCCL12397 NjP
- Samuel L. Clemens to Thomas Nast, 10 December 1872 · Hartford, Conn · UCCL00843 NjP
- Samuel L. Clemens to Charles Dudley Warner, 10? July 1873 · London, England · UCCL00951 NjP2, NjP
- Samuel L. Clemens to Andrew Chatto, 24 March 1879 · Paris, France · UCCL01643 NjP
- Samuel L. Clemens to Francis E. Bliss, 10 May 1879 · Paris, France · UCCL01653 NjP
- SLC to Unidentified, 5 July 1881 · Branford, Conn · UCCL01982 NjP
- Lara M. Gallaudet to SLC, 11 August 1881 · Indian Neck, Conn. · UCLC40823 NjP
- SLC to Philip A. Rollins, 31 December 1881 · Hartford, Conn · UCCL10694 NjP
- SLC to Unidentified, 26 August 1882 · Elmira, N.Y · UCCL09323 NjP
- SLC to James R. Osgood, 13 March 1883 · Hartford, Conn · UCCL08973 NjP
- SLC to Laurence Hutton, 22 April 1883 · Hartford, Conn · UCCL02373 NjP
- SLC to Laurence Hutton, 20 December 1883 · Hartford, Conn · UCCL02871 NjP
- SLC to Laurence Hutton, 4 February 1884 · Hartford, Conn · UCCL02905 NjP
- SLC to Laurence Hutton, 12 February 1884 · Hartford, Conn · UCCL02915 NjP
- SLC to Laurence Hutton, 19 February 1884 · Hartford, Conn · UCCL02921 NjP
- SLC to Laurence Hutton, 7 March 1884 · Hartford, Conn · UCCL02934 NjP
- SLC to James R. Osgood, 24 May 1884 · Hartford, Conn · UCCL02985 NjP
- SLC to Laurence Hutton, 19 December 1884 · Unknown place · UCCL10242 NjP
- SLC to Laurence Hutton, 22 December 1884 · Hartford, Conn · UCCL03065 NjP
- SLC to Samuel G. Dunham, 26 October 1885 · Hartford, Conn · UCCL03296 NjP
- SLC to Laurence Hutton, 14 or 21 February 1886, Hartford, Conn · UCCL03094 NjP
- SLC, OLC to Laurence Hutton, Eleanor V. Hutton, and William M. Laffan and Georgiana R. Laffan, 25 February 1886 · Hartford, Conn · UCCL03372 MH-H, NjP
- SLC to Laurence Hutton, 22 September 1887 · Hartford, Conn · UCCL03651 NjP
- SLC to Laurence Hutton, 24 November 1887 · Hartford, Conn · UCCL03670 NjP
- SLC to John W. Alexander, 10 August 1888 · Elmira, N.Y · UCCL03749 NjP
- SLC to James Mapes Dodge, 18 September 1890 · Onteora Park, N.Y · UCCL13603 NjP
- SLC to James Mapes Dodge, 27 September 1890 · Hartford, Conn · UCCL13599 NjP
- SLC to Laurence Hutton, 5 November 1890 · Hartford, Conn · UCCL04111 NjP
- SLC to Laurence Hutton, 12 August 1892 · Bad Nauheim, Germany · UCCL01720 NjP
- SLC to Laurence Hutton, 23 August 1892 · Bad Nauheim, Germany · UCCL01786 NjP
- SLC to Charles C. Eyre, 23 August 1892 · Bad Nauheim, Germany · UCCL01585 NjP
- SLC to Laurence Hutton, 5 September 1892 · Bad Nauheim, Germany · UCCL02070 NjP
- SLC to Laurence Hutton, 28 September 1892 · Florence, Italy · UCCL02382 NjP
- SLC to Laurence Hutton, 21 October 1892 · Florence, Italy · UCCL04661 NjP
- SLC to Laurence Hutton, 30 October 1892 · Florence, Italy · UCCL08925 NjP
- SLC to Mary Mapes Dodge, 2 December 1892 · Florence, Italy · UCCL13376 NjP
- SLC to Laurence Hutton, 15 December 1892 · Florence, Italy · UCCL04308 NjP
- SLC to Laurence Hutton, 2 January 1893 · Florence, Italy · UCCL04321 NjP
- SLC to Laurence Hutton, 5 February 1893 · Florence, Italy · UCCL04337 NjP
- SLC to Laurence Hutton, 16 March 1893 · Florence, Italy · UCCL04351 NjP
- SLC to Laurence Hutton, 13 September 1893 · New York, N.Y · UCCL04449 NjP
- SLC to James Mapes Dodge, 30 December 1893 · New York, N.Y · UCCL13602 NjP
- SLC to Eleanor V. Hutton, 19 June 1894 · Paris, France · UCCL04741 NjP
- SLC to Laurence Hutton, 26 July 1894 · New York, N.Y · UCCL04762 NjP
- SLC to Eleanor V. Hutton, 9 March 1895 · New York, N.Y · UCCL04848 NjP
- SLC to Laurence Hutton, 22 March 1895 · New York, N.Y · UCCL04853 NjP
- SLC to Laurence Hutton, 6 September 1896 · Guildford, England · UCCL05104 NjP
- SLC to Mary Mapes Dodge, 5 October 1896 · London, England · UCCL13377 NjP
- SLC to Laurence Hutton, 5 October 1896 · London, England · UCCL05123 NjP
- SLC to Eleanor V. Hutton, 26 November 1896 · London, England · UCCL05149 NjP
- SLC to Laurence Hutton and Eleanor V. Hutton, 22 December 1896 · London, England · UCCL05156 NjP
- OLC for SLC to Philipp Kaiser, 7 November 1897 · Vienna, Austria · UCCL13600 NjP
- SLC to Laurence Hutton, 20 February 1898 · Vienna, Austria · UCCL05352 NjP
- SLC to Laurence Hutton, 20 October 1898 · Vienna, Austria · UCCL05453 NjP
- SLC to Laurence Hutton, 12 March 1899 · Vienna, Austria · UCCL05561 NjP
- SLC to Laurence Hutton, 13 July 1899 · Sanna, Sweden · UCCL05654 NjP
- SLC to Laurence Hutton, 18 September 1899 · Sanna, Sweden · UCCL05679 NjP
- SLC to Laurence Hutton, 1 January 1900 · London, England · UCCL05740 NjP
- SLC to Laurence Hutton, 16 October 1900 · Unknown place · UCCL02999 NjP
- SLC to Laurence Hutton, 31 October 1900 · New York, N.Y · UCCL05890 NjP
- SLC to Laurence Hutton, 7 November 1900 · New York, N.Y · UCCL05899 NjP
- SLC to Laurence Hutton, 21 November 1900 · New York, N.Y · UCCL05916 NjP
- SLC to Laurence Hutton, December 1900 · New York, N.Y · UCCL08990 NjP
- SLC to Laurence Hutton, 3 December 1900 · New York, N.Y · UCCL05925 NjP
- SLC to Eleanor V. Hutton, 1 January 1901 · New York, N.Y · UCCL05957 NjP
- SLC to Francis E. Bliss, 6 January 1901 · New York, N.Y · UCCL13598 NjP
- SLC to John W. Alexander, 21 March 1901 · New York, N.Y · UCCL06022 NjP
- SLC to Laurence Hutton, 15 April 1901 · New York, N.Y · UCCL06037 NjP
- SLC to John W. Alexander, 21 April 1901 · Saranac Lake, N.Y · UCCL06040 NjP
- SLC to Laurence Hutton, 8 May 1901 · New York, N.Y · UCCL06054 NjP
- SLC to C. F. Moberly Bell, 22 September 1901 · Saranac Lake, N.Y · UCCL13219 NjP
- SLC to Laurence Hutton, 27 February 1902 · Riverdale, N.Y · UCCL06285 NjP
- SLC to Laurence Hutton, 2 March 1902 · Riverdale, N.Y · UCCL06289 NjP
- SLC to Eleanor V. Hutton, 4 September 1902 · York Harbor, Me · UCCL06426 NjP
- SLC to Laurence Hutton, 16 October 1902 · Riverdale, N.Y · UCCL06463 NjP
- H. D. Thompson for Princeton Inauguration Committee to SLC, 18 October 1902 · Princeton, N.J. · UCLC33546 NjP
- SLC to Eleanor V. Hutton, 6 November 1902 · Riverdale, N.Y · UCCL06483 NjP
- SLC per Isabel V. Lyon to Laurence Hutton, 20 December 1902 · Riverdale, N.Y · UCCL06523 NjP
- SLC to Laurence Hutton, 18 March 1903 · Riverdale, N.Y · UCCL06600 NjP
- SLC to Laurence Hutton, 19 March 1903 · New York, N.Y · UCCL06602 NjP
- SLC to John W. Alexander, 10 April 1903 · Riverdale, N.Y · UCCL06620 NjP
- SLC to Laurence Hutton and Eleanor V. Hutton, 2 July 1903 · Elmira, N.Y · UCCL06688 NjP
- SLC to Laurence Hutton, 2 October 1903 · Elmira, N.Y · UCCL06734 NjP
- SLC to Eleanor V. Hutton, 3 December 1903 · Florence, Italy · UCCL06765 NjP
- SLC to James Mapes Dodge, 25 July 1904 · Lee, Mass · UCCL13601 NjP
- SLC to Charles Orr, 30 July 1906 · Dublin, N.H · UCCL07486 NjP
- Robert Mountsier for Student's Lecture Assocition, University of Mich. To SLC, 18 May 1908 · UCLC37834 NjP
- Isabel V. Lyon for SLC to Unidentified, 20 May 1908 · New York, N.Y · UCCL08003 NjP
- SLC per Isabel V. Lyon to Unidentified, 25 May 1908 · New York, N.Y · UCCL08010 NjP
- SLC to Elizabeth A. Alexander, 30 December 1908 · Redding, Conn · UCCL08192 NjP
- SLC to Laurence Hutton, 22 February n.y. · Hartford, Conn · UCCL10244 NjP
- SLC to Laurence Hutton, 29 September · UCCL10243 NjP
- SLC to Laurence Hutton, 25 November n.y. · Hartford, Conn · UCCL10245 NjP
- SLC to Laurence Hutton, Unknown date, New York, N.Y · UCCL08989 NjP
- SLC to Laurence Hutton, Unknown date, New York, N.Y · UCCL03692 NjP
- SLC to Laurence Hutton, Unknown date · Unknown place · UCCL09025 NjP
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