Sources: CLjC
- Samuel L. Clemens to William Wright (Dan De Quille), 17 September 1864 · San Francisco, Calif · UCCL00086
- Samuel L. Clemens to William Wright (Dan De Quille), 14 July 1865 · San Francisco, Calif · UCCL11610
- Samuel L. Clemens to W. C. Kimball and W. W. Kimball, 26 April 1866 · Island of Maui, Sandwich Islands · UCCL00098
- Samuel L. Clemens to Emeline B. Beach, 31 January 1868 · Washington, D.C · UCCL00187
- Samuel L. Clemens to Emeline B. Beach, 10 February 1868 · Washington, D.C · UCCL00192
- Samuel L. Clemens to Frank Fuller, 15 August 1868 · Hartford, Conn · UCCL02744
- Samuel L. Clemens to Frank Fuller, 24 September 1868 · St. Louis, Mo · UCCL02753
- Samuel L. Clemens to Frank Fuller, 5–30 October 1868 · Hartford, Conn · UCCL09079
- Samuel L. Clemens to Edward L. Burlingame, 7 October 1868 · Hartford, Conn · UCCL02757
- Samuel L. Clemens to Pamela A. Moffett, 29? November 1868 · New York, N.Y · UCCL02771
- Samuel L. Clemens to Jervis Langdon, 29 December 1868 · Cleveland, Ohio · UCCL00212
- Samuel L. Clemens to Jane Lampton Clemens and Family, 26? March 1869 · Elmira, N.Y · UCCL00285
- Samuel L. Clemens to A. Miner Griswold (Fat Contributor), 1 September 1869 · Buffalo, N.Y · UCCL11538
- Samuel L. Clemens to Frank Fuller, 21 May 1870 · Buffalo, N.Y · UCCL00466
- Samuel L. Clemens to Elisha Bliss, Jr., 5 August 1870 · Elmira, N.Y · UCCL10994
- Samuel L. Clemens to Iretus G. Cardner, 26 October 1870 · Buffalo, N.Y · UCCL00515
- Samuel L. Clemens to Francis P. Church, 23 December 1870 · Buffalo, N.Y · UCCL02786
- Samuel L. Clemens to Alfred B. Crandell and Other Members of the Farmers’ Club, 26 December 1870 · Buffalo, N.Y · UCCL02788
- Samuel L. Clemens to James N. Gillis, 2 July 1871 · Elmira, N.Y · UCCL00631
- Samuel L. Clemens to James Redpath and George L. Fall, 13 January 1872 (1st of 2) · Pittsburgh, Pa · UCCL00717
- Samuel L. Clemens to Olivia L. Clemens, 12 October 1872 · London, England · UCCL00822
- Samuel L. Clemens to Mary Hunter Smith, 10 December 1872 · Hartford, Conn · UCCL11669
- Samuel L. Clemens to Olivia Lewis Langdon, 20 July 1873 · York, England · UCCL00955
- Samuel L. Clemens to Henry Lee, 25 or 26 September 1873 · London, England · UCCL00965
- Samuel L. Clemens to John Brown, 30 October 1873 · SS Batavia en route from Liverpool, England, to New York, N.Y · UCCL00978
- Samuel L. Clemens to Elisha Bliss, Jr., 19 February 1874 · Hartford, Conn · UCCL01052
- Samuel L. Clemens to Mr. McElroy, 10 March 1874 · Hartford, Conn · UCCL11635
- Samuel L. Clemens to Editor of the New York Evening Post, 25 June 1874 · Elmira, N.Y · UCCL00934
- Samuel L. Clemens to Frank Fuller, 6 September 1874 · Elmira, N.Y · UCCL01124
- Samuel L. Clemens to James R. Osgood, 20 February 1875 · Hartford, Conn · UCCL11540
- Samuel L. Clemens to William Wright (Dan De Quille), 1 May 1875 · Hartford, Conn · UCCL01273
- Samuel L. Clemens to William Wright (Dan De Quille), 17 September 1875 · Hartford, Conn · UCCL11612
- Samuel L. Clemens to To William Wright (Dan De Quille) per Unidentified Stenographer, 5 January 1876 · Hartford, Conn · UCCL01296
- Samuel L. Clemens to William Wright (Dan De Quille), 28 January 1876 · Hartford, Conn · UCCL01304
- Samuel L. Clemens to William Wright (Dan De Quille), 8 February 1876 · Hartford, Conn · UCCL01305
- Samuel L. Clemens to William Wright (Dan De Quille), 29 November 1876 · Hartford, Conn · UCCL02466
- Samuel L. Clemens to Miss Holmes, 13 April 1877 · Hartford, Conn · UCCL11456
- Samuel L. Clemens to Richard Edwards, per Olivia L. Clemens, 16 July 1877 · Elmira, N.Y · UCCL11826
- Samuel L. Clemens to Margaret C. Avery, November 1877 · Hartford, Conn · UCCL12465
- Samuel L. Clemens to Andrew Chatto, 3 June 1878 · Heidelberg, Germany · UCCL01567
- Samuel L. Clemens to William A. Seaver, 28 June 1878 · Heidelberg, Germany · UCCL01574
- Samuel L. Clemens to Francis E. Bliss, 13 July 1878 · Heidelberg, Germany · UCCL01576
- Samuel L. Clemens to Olivia L. Clemens, 26 August 1878 · St. Niklaus, Switzerland · UCCL01590
- Samuel L. Clemens to Daniel Slote, 4 September 1879 · Elmira, N.Y · UCCL10434
- Samuel L. Clemens to Francis E. Bliss, 8 September 1879 · Elmira, N.Y · UCCL01684
- Samuel L. Clemens to Frank Fuller, 22 November 1879 · Hartford, Conn · UCCL01723
- Samuel L. Clemens to Frank Fuller, 5 December 1879 · Hartford, Conn · UCCL01733
- Samuel L. Clemens to Frank Fuller, 19 December 1879 · Hartford, Conn · UCCL01742
- Samuel L. Clemens to Frank Fuller per Telegraph Operator, 30 October 1880 · Hartford, Conn · UCCL01849
- SLC to OLC, 7 June 1881 · Hartford, Conn · UCCL01839
- SLC to Karl Gerhardt and Hattie J. Gerhardt, 31 August 1881 · Elmira, N.Y · UCCL02019
- SLC to Karl Gerhardt and Hattie J. Gerhardt, 24 February 1882 · Hartford, Conn · UCCL02165
- SLC to Karl Gerhardt and Hattie J. Gerhardt, 21 March 1882 · Hartford, Conn · UCCL02177
- SLC to Karl Gerhardt and Hattie J. Gerhardt, 23 March 1882 · Hartford, Conn · UCCL02179
- SLC to Karl Gerhardt and Hattie J. Gerhardt, 1 June 1882 · Hartford, Conn · UCCL02210
- SLC to Karl Gerhardt and Hattie J. Gerhardt, 25 January–6 February 1883 · Hartford, Conn · UCCL10134
- SLC to Karl Gerhardt and Hattie J. Gerhardt, 26 March 1883 · Hartford, Conn · UCCL02364
- SLC to James R. Osgood, 6 April 1883 · Hartford, Conn · UCCL02803
- SLC to Henry C. Robinson, 11 July 1883 · Elmira, N.Y · UCCL11235
- SLC to Karl Gerhardt and Hattie J. Gerhardt, 20 July 1883 · Elmira, N.Y · UCCL11182
- SLC to Charles L. Webster, 30 October 1883 · Hartford, Conn · UCCL11181
- SLC to Karl Gerhardt and Hattie J. Gerhardt, 5 March 1884 · Hartford, Conn · UCCL02926
- SLC to Andrew Chatto, 1 April 1884 · Hartford, Conn · UCCL11941
- SLC to Unidentified, 5 August 1884 · Elmira, N.Y · UCCL09177
- SLC to Karl Gerhardt, 20 September 1884 · New York, N.Y · UCCL01319
- SLC to Charles Casey, 11 March 1885 · Hartford, Conn · UCCL03187
- SLC to Jesse R. Grant, 4 July 1885 · Elmira, N.Y · UCCL10672
- SLC to Karl Gerhardt, 5 July 1885 · Elmira, N.Y · UCCL03251
- SLC to Jay H. Gibson, 12 July 1886 · Elmira, N.Y · UCCL10671
- SLC to Charles D. Warner, 22 July 1886 · Elmira, N.Y · UCCL10349
- SLC to Andrew Chatto, 12 August 1886 · Elmira, N.Y · UCCL12175
- SLC to Clara L. Spaulding, 20 August 1886 · Elmira, N.Y · UCCL03442
- SLC to Karl Gerhardt, 7 October 1886 · Hartford, Conn · UCCL11541
- SLC to William Smith, 15 December 1886 · Hartford, Conn · UCCL11176
- SLC to Richard Watson Gilder, 31 January 1887 · Hartford, Conn · UCCL11427
- SLC to Cordelia W. Foote, 2 December 1887 · Hartford, Conn · UCCL03672
- SLC to Franklin G. Whitmore, 25 August 1888 · Elmira, N.Y · UCCL11428
- SLC to Edward H. House, 2 March 1889 · Hartford, Conn · UCCL12176
- SLC to Frank Fuller, 5? March 1889 · Hartford, Conn · UCCL11430
- SLC to Unidentified, 11 April 1889 · Hartford, Conn · UCCL11426
- SLC to Clara L. Clemens, 15 July 1889 · Hartford, Conn · UCCL03911
- SLC to Joseph T. Goodman, 29 November 1889 · Hartford, Conn · UCCL03980
- SLC to Philadelphia Press, Unknown date · Unknown place · UCCL11481
- SLC to Dean Sage, 5 February 1890 · Hartford, Conn · UCCL04012
- SLC to Andrew Chatto, 10 March 1890 · Hartford, Conn · UCCL11429
- SLC to Telephone Co., 15 January–15 February 1891 · Hartford, Conn · UCCL12234
- SLC to Richard Watson Gilder, 19 October 1892 · Florence, Italy · UCCL09229
- SLC to Henry M. Alden, 24 November 1892 · Florence, Italy · UCCL09770
- SLC to Frederick J. Hall, 1 January 1893 · Florence, Italy · UCCL04318
- SLC to Unidentified, 2 July 1893 · Munich, Germany · UCCL11945
- SLC to William W. Ellsworth, 15 September 1893 · New York, N.Y · UCCL11341
- SLC to Unidentified, 19 September 1893 · New York, N.Y · UCCL09425
- SLC to OLC, 26 September 1893 · New York, N.Y · UCCL04461
- SLC to Helena Gilder, 17 February 1894 · New York, N.Y · UCCL12055
- SLC to Millicent Library, 22 February 1894 · Fairhaven, Mass · UCCL04696
- SLC to Miss Bronson, 4 July 1894 · La Bourboule, France · UCCL04751
- SLC to Susy (Olivia Susan) Clemens, 8 August 1894 · New York, N.Y · UCCL04776
- SLC to Lloyd S. Bryce, 30 November 1894 · Paris, France · UCCL04816
- SLC to Clara L. Spaulding, 2 July 1895 · Elmira, N.Y · UCCL04924
- SLC to J. Henry Harper, 21 August 1895 · Victoria, Canada · UCCL04956
- SLC to Jack Harrington, 28 August 1895 · RMS Warrimoo, en route from Victoria, Canada, to Sydney, Australia · UCCL11651
- SLC to Miss Buckley, 15 September 1895 · Melbourne, Australia · UCCL04961
- SLC to Andrew Chatto, 19 August 1896 · Guildford, England · UCCL11942
- SLC to Francis E. Bliss, 3 November 1897 · Vienna, Austria · UCCL05305
- SLC to Richard Watson Gilder, 7 May 1898 · Kaltenleutgeben, Austria · UCCL05386
- SLC to Francis E. Bliss, 18 June 1898 · Kaltenleutgeben, Austria · UCCL11197
- SLC to Kate S. Littlewood, 5 August 1898 · Kaltenleutgeben, Austria · UCCL08818
- SLC to Edward W. Bok, 26 September 1898 · Vienna, Austria · UCCL11468
- SLC to Francis E. Bliss, 27 February 1899 · Vienna, Austria · UCCL05552
- SLC to John Brisben Walker, 5 April 1899 · Vienna, Austria · UCCL11586
- SLC to Samuel G. Blythe, 12 February 1900 · London, England · UCCL11587
- SLC to Canon Wiberforce, 17 April 1900 · London, England · UCCL12177
- SLC to J. Y. W. MacAlister, 1–3 October 1900 · London, England · UCCL05874
- OLC to Mrs. Frank Fuller, 15 November 1900 · New York, N.Y · UCCL05906
- SLC to Unidentified, 30 November 1900 · New York, N.Y · UCCL05922
- SLC to Edmund C. Stedman, 12 December 1900 · New York, N.Y · UCCL05930
- SLC to Plasmon Co., 29 January 1901 · New York, N.Y · UCCL12227
- SLC to John W. Lloyd, 8 March ?1901 · New York, N.Y · UCCL13252
- SLC to Virginia F. Boyle, 16 September 1901 · Saranac Lake, N.Y · UCCL06137
- SLC to Plasmon Co., 10 April 1902 · Riverdale, N.Y · UCCL06321
- SLC to Elisabeth Brachmann, 14 April 1902 · Riverdale, N.Y · UCCL10673
- SLC to Katharine I. Harrison, 26 April 1902 · Riverdale, N.Y · UCCL06330
- SLC to Klaw and Erlanger, 7 August 1902 · York Harbor, Me · UCCL12225
- SLC to Barbara Mullen, 12 December 1902 · Riverdale, N.Y · UCCL06514
- SLC to William Digby, 14 January 1903 · Riverdale, N.Y · UCCL11680
- SLC to Frederick A. Duneka, 15 June 1903 · Riverdale, N.Y · UCCL06678
- SLC per Clara L. Clemens to Frances R. Massiglia, 18 January 1904 · Florence, Italy · UCCL11739
- Isabel V. Lyon to Katharine I. Harrison, 1 March 1904 · Florence, Italy · UCCL11215
- SLC to Mrs. Jordan Mott, 12 April 1904 · Florence, Italy · UCCL11196
- SLC to Charles D. Burrage, 11 February 1905 · New York, N.Y · UCCL11195
- SLC to Clara L. Clemens, 18 June 1905 · Dublin, N.H · UCCL07063
- SLC to Clara L. Clemens, 29 June 1905 · Dublin, N.H · UCCL07073
- SLC to Virginia F. Boyle, 16 July 1905 · Dublin, N.H · UCCL07086
- SLC to Helena Gilder, 28 July 1905 · Dublin, N.H · UCCL12056
- SLC to Norman Hapgood, 18? September 1905 · Dublin, N.H · UCCL07123
- SLC to Clara L. Clemens, 3 October 1905 (2nd of 2) · Dublin, N.H · UCCL11367
- SLC to Alice W. Pearmain, 7 November 1905 · New York, N.Y · UCCL12665
- SLC to Gertrude Natkin, 18 February 1906 · Unknown place · UCCL12546
- SLC to Govinier C. Hall, 24 February 1906 · New York, N.Y · UCCL12178
- SLC to Clara L. Clemens, 2–3 October 1906 · Dublin, N.H · UCCL07533
- SLC per Isabel V. Lyon to Mrs. ? Caverly, 17 December 1906 · New York, N.Y · UCCL12233
- SLC to Jean L. Clemens, 25 February 1907 · New York, N.Y · UCCL07664
- SLC to Jean Clemens, 5 March 1907 · New York, N.Y · UCCL07670
- SLC to Catherine Gregory, 6 April 1907 · New York, N.Y · UCCL13007
- SLC to Clara L. Clemens, 2 May 1907 · New York, N.Y · UCCL07705
- SLC to Jean Clemens, 14 May 1907 · Tuxedo Park, N.Y · UCCL07720
- SLC to Jean Clemens, 23 June 1907 · London, England · UCCL07767
- SLC to Clara L. Clemens, 30 June 1907 · London, England · UCCL07773
- SLC to New York Herald, 4 July 1907 · London, England · UCCL11974
- SLC to Jean Clemens, 4 July 1907 · London, England · UCCL07778
- SLC to Jean Clemens, 12 July 1907 · London, England · UCCL07782
- SLC to Clara L. Clemens, 12 July 1907 · London, England · UCCL07783
- SLC to Helena Gilder, 11 February 1908 · New York, N.Y · UCCL12063
- SLC to Dorothea Gilder, 11 February 1908 · New York, N.Y · UCCL12581
- SLC to Jean Clemens, 20 May 1908 · New York, N.Y · UCCL08005
- SLC to Jean Clemens, 21 May 1908 · New York, N.Y · UCCL08006
- SLC to Jean Clemens, 5 June 1908 · New York, N.Y · UCCL08021
- SLC to Jean Clemens, 14 June 1908 · New York, N.Y · UCCL08028
- SLC to Jean L. Clemens, 2 July 1908 · Redding, Conn · UCCL08051
- SLC to Jean Clemens, 28 July 1908 · Redding, Conn · UCCL08062
- SLC to Jean Clemens, 9 August 1908 · Redding, Conn · UCCL08077
- SLC to Amelia Dunne Hookway, October 1908 · Redding, Conn · UCCL08096
- SLC to Jean Clemens, 2 October 1908 · Redding, Conn · UCCL08118
- SLC to Archibald Henderson, 21 December 1908 · Redding, Conn · UCCL11526
- SLC to Jean Clemens, 19 April 1909 · Redding, Conn · UCCL08385
- SLC to Amelia Dunne Hookway, 5 June 1909 · Redding, Conn · UCCL12230
- SLC to Amelia Dunne Hookway, 7 June 1909 · Redding, Conn · UCCL12231
- SLC to the Printer, 26 December 1909 · Redding, Conn · UCCL11212
- Clara L. Clemens to Mrs. ? Wilson, 1 February–30 March 1910 · Redding, Conn · UCCL11192
- SLC to Henry H. Rogers, Unknown date · Unknown place · UCCL09018
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