Addressees: Holmes, Oliver Wendell
- Unidentified American Publishing Company employee for SLC to Oliver Wendell Holmes, 15 September 1869 · Buffalo, N.Y · UCCL12512 MH-H
- Samuel L. Clemens to Oliver Wendell Holmes, 30 September 1869 · Buffalo, N.Y · UCCL00360 DLC
- SLC to Oliver Wendell Holmes, 1‒3 November 1875 · Hartford, Conn · UCCL14127 CU-MARK
- Samuel L. Clemens to Oliver Wendell Holmes, 3? November 1875 · Hartford, Conn · UCCL12099 IaDm2
- SLC to Ralph Waldo Emerson, Henry Wadsworth Longfellow, and Oliver Wendell Holmes, 27 December 1877 · Hartford, Conn · UCCL01184 MH-H
- SLC to Oliver W. Holmes, 29 November 1885 · Hartford, Conn · UCCL12318
- SLC to Joel Chandler Harris, Oliver Wendell Holmes, Frank R. Stockton and Charles Dudley Warner, 29 November 1885 · Hartford, Conn · UCCL03318 CLU-SC
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