Sources: UkReU
- Samuel L. Clemens to Andrew Chatto, 27 March 1880 · Hartford, Conn · UCCL00743
- Samuel L. Clemens to Chatto and Windus, 25 April 1880 · Hartford, Conn · UCCL00779
- Samuel L. Clemens to Chatto and Windus, 1 May 1880 · Hartford, Conn · UCCL00783
- SLC to Chatto & Windus, 25 August 1881 · Boston, Mass · UCCL01591
- SLC to Chatto & Windus, 27 November 1881 · Montreal, Canada · UCCL02100
- SLC to Chatto & Windus, 29 May 1882 · Hartford, Conn · UCCL01623
- SLC to Chatto & Windus, 28 February 1883 · Hartford, Conn · UCCL01648
- SLC to Andrew Chatto, 11 June 1883 · Hartford, Conn · UCCL00813
- SLC to Andrew Chatto, 12 November 1883 · Hartford, Conn · UCCL00863
- SLC to Andrew Chatto, 11 March 1885 · Hartford, Conn · UCCL01672
- SLC to Chatto & Windus, 8 September 1885 · Elmira, N.Y · UCCL03286
- SLC to Andrew Chatto, 2 June 1886 · Hartford, Conn · UCCL00866
- SLC to Chatto & Windus, 12 July 1886 · Elmira, N.Y · UCCL01506
- SLC to Andrew Chatto, 14 September 1886 · Elmira, N.Y · UCCL01675
- SLC to Andrew Chatto, 15 February 1887 · Hartford, Conn · UCCL01775
- SLC to Chatto & Windus, 19 September 1887 · Hartford, Conn · UCCL09055
- SLC to Andrew Chatto, 19 September 1887 · Hartford, Conn · UCCL01851
- SLC to Andrew Chatto, 8 January 1888 · Hartford, Conn · UCCL00919
- SLC to Andrew Chatto, 16 January 1888 · Hartford, Conn · UCCL00678
- SLC to Andrew Chatto, 7 March 1888 · Hartford, Conn · UCCL01424
- SLC to Andrew Chatto, 6 June 1888 · Hartford, Conn · UCCL00703
- SLC to Andrew Chatto, 16 July 1889 · Hartford, Conn · UCCL03913
- SLC to Andrew Chatto, 21 August 1889 · Elmira, N.Y · UCCL01442
- SLC to Chatto & Windus, 6 December 1889 · Niagara Falls, Canada · UCCL09494
- SLC to Andrew Chatto, 18 December 1889 · Hartford, Conn · UCCL01299
- SLC to Chatto & Windus, 12 February 1890 · New York, N.Y · UCCL09481
- SLC to Andrew Chatto, 17 March 1891 · Hartford, Conn · UCCL09492
- SLC to Andrew Chatto, 29 March 1891 · Hartford, Conn · UCCL01209
- SLC to Chatto & Windus, 12 July 1891 · Aix-les-Bains, France · UCCL00972
- SLC to Andrew Chatto, 18 July 1891 · Aix-les-Bains, France · UCCL00946
- SLC to Andrew Chatto, 25 July 1891 · Aix-les-Bains, France · UCCL01042
- SLC to Andrew Chatto, 15 August 1891 · Marienbad, Germany · UCCL01131
- SLC to Chatto & Windus, 22 December 1891 · Berlin, Germany · UCCL01168
- SLC to Chatto & Windus, 23 May 1893 · SS Kaiser Wilhelm · UCCL04405
- SLC to Chatto & Windus, 17 June 1894 · Paris, France · UCCL04739
- OLC to Chatto & Windus, 6 July 1894 · La Bourboule, France · UCCL01229
- SLC to Andrew Chatto, 7 May 1895 · Paris, France · UCCL01599
- OLC to Chatto & Windus, June 1895 · Elmira, N.Y · UCCL09508
- SLC to Chatto & Windus, 23 December 1897 · Vienna, Austria · UCCL01260
- OLC to Chatto & Windus, 10 January 1898 · Vienna, Austria · UCCL01398
- SLC to Chatto & Windus, 13 November 1898 · Vienna, Austria · UCCL01289
- SLC to Chatto & Windus, 19 November 1898 · Vienna, Austria · UCCL01390
- SLC to Chatto & Windus, 11 April 1899 · Vienna, Austria · UCCL09484
- SLC to Chatto & Windus, 18 June 1899 · London, England · UCCL09489
- SLC per Olivia L. Clemens to Chatto & Windus, 7 September 1899 · Sanna, Sweden · UCCL01404
- SLC to Chatto & Windus, 2 April 1900 · London, England · UCCL00844
- SLC to Chatto & Windus, 25 January 1901 · New York, N.Y · UCCL09491
- SLC to Chatto and Windus, 19 April 1902 · Riverdale, N.Y · UCCL10596
- SLC per Isabel V. Lyon to Chatto & Windus, 22 November 1902 · Riverdale, N.Y · UCCL01410
- SLC per Isabel V. Lyon to Chatto & Windus, 3 June 1907 · Tuxedo Park, N.Y · UCCL01478
- SLC to Nancy Langhorne Astor, 28 April 1908 · New York, N.Y · UCCL07988
- SLC to Mr. Mossè, 28 June, Unknown place · UCCL12590
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