Addressees: Langdon, Jervis
- Samuel L. Clemens to Jervis Langdon, 2 December 1868 · New York, N.Y · UCCL02772
- Samuel L. Clemens to Jervis Langdon, 29 December 1868 · Cleveland, Ohio · UCCL00212
- Samuel L. Clemens to Olivia L. Langdon with a note to Jervis and Olivia Lewis Langdon, 24 May 1869 · South Windsor, Conn · UCCL00309
- Samuel L. and Olivia L. Clemens to Jervis and Olivia Lewis Langdon, 9 February 1870 · Buffalo, N.Y · UCCL00423
- Olivia L. Clemens to Olivia Lewis Langdon, Susan Crane, and Jervis Langdon, 12 February 1870 · Buffalo, N.Y · UCCL00425
- Olivia L. and Samuel L. Clemens to Jervis Langdon, 26 February 1870 · Buffalo, N.Y · UCCL00433
- OLC to Jervis and Olivia Lewis Langdon · UCCL00436
- Samuel L. and Olivia L. Clemens to Jervis Langdon, 2 and 3 March 1870 · Buffalo, N.Y · UCCL00437
- Samuel L. and Olivia L. Clemens to Jervis and Olivia Lewis Langdon, 27 March 1870 · Buffalo, N. Y · UCCL00450
- Samuel L. and Olivia L. Clemens to Jervis and Olivia Lewis Langdon, 1 April 1870 · Buffalo, N. Y · UCCL00452
- Samuel L. and Olivia L. Clemens to Jervis and Olivia Lewis Langdon, 16 and 17 April 1870 · Buffalo, N.Y · UCCL00455
- Olivia L. and Samuel L. Clemens to Jervis Langdon, 13 May 1870 · Buffalo, N.Y · UCCL00464
- Samuel L. Clemens to Jervis Langdon, 22 May 1870 · Buffalo, N.Y · UCCL00469
- Samuel L. and Olivia L. Clemens to Jervis and Olivia Lewis Langdon, 19 June 1870 · Buffalo, N.Y · UCCL00480
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