Sources: NjP
- Samuel L. Clemens to James R. Osgood, 31 March 1872 · Elmira, N.Y · UCCL00739
- SLC to Henry Lee, 19 October 1872 (2nd of 2) · London, England · UCCL12397
- Samuel L. Clemens to Thomas Nast, 10 December 1872 · Hartford, Conn · UCCL00843
- Samuel L. Clemens to Charles Dudley Warner, 10? July 1873 · London, England · UCCL00951
- Samuel L. Clemens to Andrew Chatto, 24 March 1879 · Paris, France · UCCL01643
- Samuel L. Clemens to Francis E. Bliss, 10 May 1879 · Paris, France · UCCL01653
- SLC to Unidentified, 5 July 1881 · Branford, Conn · UCCL01982
- SLC to Philip A. Rollins, 31 December 1881 · Hartford, Conn · UCCL10694
- SLC to Unidentified, 26 August 1882 · Elmira, N.Y · UCCL09323
- SLC to James R. Osgood, 13 March 1883 · Hartford, Conn · UCCL08973
- SLC to Laurence Hutton, 22 April 1883 · Hartford, Conn · UCCL02373
- SLC to Laurence Hutton, 20 December 1883 · Hartford, Conn · UCCL02871
- SLC to Laurence Hutton, 4 February 1884 · Hartford, Conn · UCCL02905
- SLC to Laurence Hutton, 12 February 1884 · Hartford, Conn · UCCL02915
- SLC to Laurence Hutton, 19 February 1884 · Hartford, Conn · UCCL02921
- SLC to Laurence Hutton, 7 March 1884 · Hartford, Conn · UCCL02934
- SLC to James R. Osgood, 24 May 1884 · Hartford, Conn · UCCL02985
- SLC to Laurence Hutton, 19 December 1884 · Unknown place · UCCL10242
- SLC to Laurence Hutton, 22 December 1884 · Hartford, Conn · UCCL03065
- SLC to Samuel G. Dunham, 26 October 1885 · Hartford, Conn · UCCL03296
- SLC to Laurence Hutton, 14 or 21 February 1886, Hartford, Conn · UCCL03094
- SLC, OLC to Laurence Hutton, Eleanor V. Hutton, and William M. Laffan and Georgiana R. Laffan, 25 February 1886 · Hartford, Conn · UCCL03372
- SLC to Laurence Hutton, 22 September 1887 · Hartford, Conn · UCCL03651
- SLC to Laurence Hutton, 24 November 1887 · Hartford, Conn · UCCL03670
- SLC to John W. Alexander, 10 August 1888 · Elmira, N.Y · UCCL03749
- SLC to James Mapes Dodge, 18 September 1890 · Onteora Park, N.Y · UCCL13603
- SLC to James Mapes Dodge, 27 September 1890 · Hartford, Conn · UCCL13599
- SLC to Laurence Hutton, 5 November 1890 · Hartford, Conn · UCCL04111
- SLC to Laurence Hutton, 12 August 1892 · Bad Nauheim, Germany · UCCL01720
- SLC to Laurence Hutton, 23 August 1892 · Bad Nauheim, Germany · UCCL01786
- SLC to Charles C. Eyre, 23 August 1892 · Bad Nauheim, Germany · UCCL01585
- SLC to Laurence Hutton, 5 September 1892 · Bad Nauheim, Germany · UCCL02070
- SLC to Laurence Hutton, 28 September 1892 · Florence, Italy · UCCL02382
- SLC to Laurence Hutton, 21 October 1892 · Florence, Italy · UCCL04661
- SLC to Laurence Hutton, 30 October 1892 · Florence, Italy · UCCL08925
- SLC to Mary Mapes Dodge, 2 December 1892 · Florence, Italy · UCCL13376
- SLC to Laurence Hutton, 15 December 1892 · Florence, Italy · UCCL04308
- SLC to Laurence Hutton, 2 January 1893 · Florence, Italy · UCCL04321
- SLC to Laurence Hutton, 5 February 1893 · Florence, Italy · UCCL04337
- SLC to Laurence Hutton, 16 March 1893 · Florence, Italy · UCCL04351
- SLC to Laurence Hutton, 13 September 1893 · New York, N.Y · UCCL04449
- SLC to James Mapes Dodge, 30 December 1893 · New York, N.Y · UCCL13602
- SLC to Eleanor V. Hutton, 19 June 1894 · Paris, France · UCCL04741
- SLC to Laurence Hutton, 26 July 1894 · New York, N.Y · UCCL04762
- SLC to Eleanor V. Hutton, 9 March 1895 · New York, N.Y · UCCL04848
- SLC to Laurence Hutton, 22 March 1895 · New York, N.Y · UCCL04853
- SLC to Laurence Hutton, 6 September 1896 · Guildford, England · UCCL05104
- SLC to Mary Mapes Dodge, 5 October 1896 · London, England · UCCL13377
- SLC to Laurence Hutton, 5 October 1896 · London, England · UCCL05123
- SLC to Eleanor V. Hutton, 26 November 1896 · London, England · UCCL05149
- SLC to Laurence Hutton and Eleanor V. Hutton, 22 December 1896 · London, England · UCCL05156
- OLC to Mrs. Jonathan Curtis, 23 April 1897 · London, England · UCCL10695
- OLC for SLC to Philipp Kaiser, 7 November 1897 · Vienna, Austria · UCCL13600
- SLC to Laurence Hutton, 20 February 1898 · Vienna, Austria · UCCL05352
- SLC to Laurence Hutton, 20 October 1898 · Vienna, Austria · UCCL05453
- SLC to Laurence Hutton, 12 March 1899 · Vienna, Austria · UCCL05561
- SLC to Laurence Hutton, 13 July 1899 · Sanna, Sweden · UCCL05654
- SLC to Laurence Hutton, 18 September 1899 · Sanna, Sweden · UCCL05679
- SLC to Laurence Hutton, 1 January 1900 · London, England · UCCL05740
- SLC to Laurence Hutton, 16 October 1900 · Unknown place · UCCL02999
- SLC to Laurence Hutton, 31 October 1900 · New York, N.Y · UCCL05890
- SLC to Laurence Hutton, 7 November 1900 · New York, N.Y · UCCL05899
- SLC to Laurence Hutton, 21 November 1900 · New York, N.Y · UCCL05916
- OLC to Laurence Hutton, 25 November 1900 · New York, N.Y · UCCL05919
- SLC to Laurence Hutton, December 1900 · New York, N.Y · UCCL08990
- SLC to Laurence Hutton, 3 December 1900 · New York, N.Y · UCCL05925
- SLC to Eleanor V. Hutton, 1 January 1901 · New York, N.Y · UCCL05957
- SLC to Francis E. Bliss, 6 January 1901 · New York, N.Y · UCCL13598
- SLC to John W. Alexander, 21 March 1901 · New York, N.Y · UCCL06022
- SLC to Laurence Hutton, 15 April 1901 · New York, N.Y · UCCL06037
- SLC to John W. Alexander, 21 April 1901 · Saranac Lake, N.Y · UCCL06040
- SLC to Laurence Hutton, 8 May 1901 · New York, N.Y · UCCL06054
- SLC to C. F. Moberly Bell, 22 September 1901 · Saranac Lake, N.Y · UCCL13219
- SLC to Laurence Hutton, 27 February 1902 · Riverdale, N.Y · UCCL06285
- SLC to Laurence Hutton, 2 March 1902 · Riverdale, N.Y · UCCL06289
- SLC to Eleanor V. Hutton, 4 September 1902 · York Harbor, Me · UCCL06426
- SLC to Laurence Hutton, 16 October 1902 · Riverdale, N.Y · UCCL06463
- SLC to Eleanor V. Hutton, 6 November 1902 · Riverdale, N.Y · UCCL06483
- SLC per Isabel V. Lyon to Laurence Hutton, 20 December 1902 · Riverdale, N.Y · UCCL06523
- SLC to Laurence Hutton, 18 March 1903 · Riverdale, N.Y · UCCL06600
- SLC to Laurence Hutton, 19 March 1903 · New York, N.Y · UCCL06602
- SLC to John W. Alexander, 10 April 1903 · Riverdale, N.Y · UCCL06620
- SLC to Laurence Hutton and Eleanor V. Hutton, 2 July 1903 · Elmira, N.Y · UCCL06688
- SLC to Laurence Hutton, 2 October 1903 · Elmira, N.Y · UCCL06734
- SLC to Eleanor V. Hutton, 3 December 1903 · Florence, Italy · UCCL06765
- SLC to James Mapes Dodge, 25 July 1904 · Lee, Mass · UCCL13601
- SLC to Charles Orr, 30 July 1906 · Dublin, N.H · UCCL07486
- Isabel V. Lyon for SLC to Unidentified, 20 May 1908 · New York, N.Y · UCCL08003
- SLC per Isabel V. Lyon to Unidentified, 25 May 1908 · New York, N.Y · UCCL08010
- SLC to Elizabeth A. Alexander, 30 December 1908 · Redding, Conn · UCCL08192
- SLC to Laurence Hutton, 22 February n.y. · Hartford, Conn · UCCL10244
- SLC to Laurence Hutton, 29 September · UCCL10243
- SLC to Laurence Hutton, 25 November n.y. · Hartford, Conn · UCCL10245
- SLC to Laurence Hutton, Unknown date, New York, N.Y · UCCL08989
- SLC to Laurence Hutton, Unknown date, New York, N.Y · UCCL03692
- SLC to Laurence Hutton, Unknown date · Unknown place · UCCL09025
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