Addressees: McClure, S. S
- SLC to Samuel S. McClure, 28 July 1891 · Aix-les-Bains, France · UCCL12675 InFw2
- SLC to Samuel S. McClure, 7 August 1897 · Lucerne, Switzerland · UCCL11086 CU-MARK
- SLC to Samuel S. McClure, 26 June 1898 · Kaltenleutgeben, Austria · UCCL12457
- Samuel L. Clemens to S. S. McClure, 12 January 1900 . London, England · UCCL13208 CU-MARK
- SLC to Samuel S. McClure, 1 February 1900 · London, England · UCCL08735 CU-MARK
- SLC to Samuel S. McClure, May 1900 · London, England · UCCL12086
- SLC to Richard Watson Gilder, Henry M. Alden et al, 21 July 1903 · Elmira, N.Y · UCCL08234 NN-BGC
- SLC per Isabel V. Lyon to Samuel S. McClure, 10 June 1906 · Dublin, N.H · UCCL07452 CU-MARK
- SLC per Isabel V. Lyon to Samuel S. McClure, 12 June 1906 · Dublin, N.H · UCCL12144 CU-MARK
- Isabel V. Lyon for SLC to Samuel S. McClure, 15 June 1906 · Dublin, N.H · UCCL07455 CU-MARK
- SLC per Isabel V. Lyon to S. S. McClure, 23? June 1906 · Dublin, New Hampshire · UCCL13030 CU-MARK
- SLC per IVL to Samuel S. McClure, On or after 28 February 1907 · New York, N.Y · UCCL13383 CU-MARK
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