Senders: McDowell, William O.
- William O. McDowell to SLC, 12 July 1890 · New York, N.Y. · UCLC45160 CU-MARK
- William O. McDowell to SLC, 1 October 1890 · Newark, N.J. · UCLC45233 CU-MARK
- William O. McDowell to SLC, 23 November 1906 · New York, N.Y. · UCLC35712 CU-MARK
- William O. McDowell to SLC, 23 November 1906 · UCLC39204 CU-MARK
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