Senders: Bowker, Richard R.
- Richard R. Bowker to SLC, 10 October 1889 · New York, N.Y. · UCLC44709 CU-MARK
- Richard R. Bowker to SLC, 30 November 1889 · New York, N.Y. · UCLC44736 CU-MARK
- Richard R. Bowker to SLC, 24 November 1905 · New York, N.Y. · UCLC34823 CU-MARK
- Richard R. Bowker to SLC, 7 February 1906 · Stockbridge, Mass. · UCLC35231 CU-MARK
- Richard R. Bowker to SLC, 3 June 1906 · Stockbridge, Mass. · UCLC35458 CU-MARK
- Richard R. Bowker to SLC, 16 December 1908 · New York, N.Y. · UCLC38463 CU-MARK
- Richard R. Bowker to SLC, 27 December 1909 · New York, N.Y. · UCLC40586 CU-MARK
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