Addressees: Langdon, Olivia Lewis
- Samuel L. Clemens to Olivia Lewis (Mrs. Jervis) Langdon, 13 February 1869 · Ravenna, Ohio · UCCL00249
- 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. Clemens to Olivia Lewis (Mrs. Jervis) Langdon, 23 June 1869 · New York, N.Y · UCCL00319
- Samuel L. and Olivia L. Clemens to Jervis and Olivia Lewis Langdon, 9 February 1870 · Buffalo, N.Y · UCCL00423
- Samuel L. and Olivia L. Clemens to Olivia Lewis Langdon, 20 February 1870 · Buffalo, N.Y · UCCL00430
- 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
- Samuel L. and Olivia L. Clemens to Jervis and Olivia Lewis Langdon, 19 June 1870 · Buffalo, N.Y · UCCL00480
- Samuel L. Clemens to Olivia Lewis Langdon, per Telegraph Operator, 7 November 1870 · Buffalo, N.Y · UCCL00526
- Samuel L. Clemens to Olivia Lewis Langdon, 11? November 1870 · Buffalo, N.Y · UCCL08958
- Samuel L. Clemens to Olivia Lewis Langdon, 19 November 1870 · Buffalo, N.Y · UCCL00539
- Samuel L. Clemens to Olivia Lewis Langdon, 3 December 1872 · Hartford, Conn · UCCL00838
- Olivia L. and Samuel L. Clemens to Olivia Lewis Langdon, 17 February 1873 · Hartford, Conn · UCCL00879
- Olivia L. and Samuel L. Clemens to Olivia Lewis Langdon, 17 May 1873 · SS Batavia at New York, N.Y · UCCL00916
- Samuel L. Clemens to Olivia Lewis Langdon, 20 July 1873 · York, England · UCCL00955
- Olivia L. and Samuel L. Clemens to Olivia Lewis Langdon, 2 and 6 August 1873 · Edinburgh, Scotland · UCCL00959
- Samuel L. Clemens to Olivia Lewis Langdon, 12 October 1873 · London, England · UCCL00973
- Olivia L. and Samuel L. Clemens to Olivia Lewis Langdon, 24? September 1874 · Hartford, Conn · UCCL01133
- Olivia L. and Samuel L. Clemens to Olivia Lewis Langdon, 14 March 1875 · Hartford, Conn · UCCL01207
- Samuel L. Clemens to Olivia Lewis Langdon, 22 December 1875 · Hartford, Conn · UCCL01288
- Olivia L. and Samuel L. Clemens to Olivia Lewis Langdon, 2 and 4 February 1877 · Hartford, Conn · UCCL01405
- Samuel L. Clemens to Olivia Lewis Langdon, 5 December 1877 · Hartford, Conn · UCCL01509
- Samuel L. Clemens to Olivia Lewis Langdon, 25 December 1877 · Hartford, Conn · UCCL01517
- Samuel L. Clemens to Olivia Lewis Langdon, 20 April 1878 · SS Holsatia en route from New York, N.Y., to Hamburg, Germany · UCCL01556
- Samuel L. Clemens to Olivia Lewis Langdon, 13 September 1878 · Geneva, Switzerland · UCCL01595
- Samuel L. Clemens to Olivia Lewis Langdon, 2 December 1878 · Munich, Germany · UCCL01611
- Olivia L. and Olivia Susan (Susy) Clemens per Olivia L. and Samuel L. Clemens to Olivia Lewis Langdon, 8 December 1878 · Munich, Germany · UCCL01612
- Samuel L. Clemens to Olivia Lewis Langdon, 26? December 1878 · Munich, Germany · UCCL01617
- Olivia L. and Samuel L. Clemens to Olivia Lewis Langdon, 19 January 1879 · Munich, Germany · UCCL01621
- Samuel L. Clemens to Olivia Lewis Langdon, 23 February 1879 · Munich, Germany · UCCL01635
- Samuel L. Clemens, Olivia Susan (Susy) Clemens (per Samuel L. Clemens), and Olivia L. Clemens to Olivia Lewis Langdon, 30 March 1879 · Paris, France · UCCL01645
- Samuel L. Clemens for Jean Clemens to Olivia Lewis Langdon, 19 August 1880 · Elmira, N.Y · UCCL01826
- Samuel L. Clemens to Olivia Lewis Langdon, 25 December 1880 · Hartford, Conn · UCCL01881
- SLC to Olivia Lewis Langdon, 9 January 1881 · Hartford, Conn · UCCL01889
- SLC to Olivia Lewis Langdon, 19 August 1883 · Elmira, N.Y · UCCL02824
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