Addressees: Clemens, Katharine B
- SLC, OLC to Katharine B. Clemens, 29 March 1899 · Vienna, Austria · UCCL05570 CtHMTH
- SLC to James R. and Katharine B. Clemens, 3 May 1899 · Vienna, Austria · UCCL08855 CtHMTH
- SLC to James R. and Katharine B. Clemens, 28 March 1900 · London, England · UCCL08858 CtHMTH
- SLC to Katharine B. Clemens, 13 June 1900 · London, England · UCCL05820 CtHMTH
- SLC to Katharine B. Clemens, June 1902 · Unknown place · UCCL11260 CU-MARK
- SLC to Katharine B. Clemens, June 1902 · Unknown place · UCCL09369 CtHMTH
- SLC to James R. Clemens and Katharine B. Clemens, 22 August 1902 · York Harbor, Me · UCCL06413 CtHMTH
- SLC to Katharine B. Clemens, 27 August 1902 · York Harbor, Me · UCCL06416 CtHMTH
- SLC to Katharine B. Clemens, 26 September 1902 · York Harbor, Me · UCCL06443 CtHMTH
- SLC to Katharine B. Clemens, 31 August 1905 · Dublin, N.H · UCCL07121 CtHMTH
- SLC to Katharine B. Clemens, 16 October 1906 · Dublin, N.H · UCCL07549 CtHMTH
- SLC per Isabel V. Lyon to Katharine B. Clemens, 5 October 1907 · Tuxedo Park, N.Y · UCCL08894 CtHMTH
- SLC per Isabel V. Lyon to Katharine B. Clemens, 13 August 1908 · Redding, Conn · UCCL08900 CtHMTH
- SLC per Isabel V. Lyon to Katharine B. Clemens, 20 August 1908 · Redding, Conn · UCCL08901 CtHMTH
- SLC per Albert Bigelow Paine to Katharine B. Clemens, 26 December–16 March 1910 · Redding, Conn · UCCL11005 CtHMTH
- SLC to Katharine B. Clemens, 24 March 1910 · Hamilton, Bermuda · UCCL08575 CtHMTH
- SLC to James R. and Katharine B. Clemens, 25 December n.y. · Unknown place · UCCL08390 CtHMTH
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