Addressees: Brown, John
- Samuel L. Clemens to John Brown, 22 and 25 September 1873 · London, England · UCCL03362
- 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 John Brown, 28 February 1874 · Hartford, Conn · UCCL01056
- Samuel L. Clemens to John Brown, 27 April 1874 · Elmira, N.Y · UCCL01080
- Samuel L. Clemens to John Brown, 15 June 1874 · Elmira, N.Y · UCCL02470
- Samuel L. Clemens and Olivia L. Clemens to John Brown, 4 September 1874 · Elmira, N.Y · UCCL01122
- Olivia L. and Samuel L. Clemens to John Brown, 25–28 October 1875 · Hartford, Conn · UCCL01279
- Samuel L. and Olivia L. Clemens to John Brown, 22 June 1876 · Elmira, N.Y · UCCL01343
- Samuel L. Clemens to John Brown, 5 December 1876 · Hartford, Conn · UCCL02465
- Samuel L. Clemens to John Brown, 25 and 27 August 1877 · Elmira, N.Y · UCCL01473
- Samuel L. Clemens to John Brown, 21 August 1879 · Liverpool, England · UCCL01682
- Samuel L. Clemens to John Brown, 14 and 15 August 1880 · Elmira, N.Y · UCCL02814
1