Senders: Knickerbocker Publishing Company
- E. D. for Knickerbocker Publishing Company to SLC, 23 August 1905 · New York, N.Y. · UCLC50356 CU-MARK
- Knickerbocker Publishing to SLC, 6 September 1905 · New York, N.Y. · UCLC34622 CU-MARK
- Knickerbocker Publishing to SLC, 20 September 1905 · New York, N.Y. · UCLC34646 CU-MARK
- Knickerbocker Publishing to SLC, 13 December 1906 · New York, N.Y. · UCLC35765 CU-MARK
- Knickerbocker Publishing to SLC, 18 May 1907 · UCLC36419 CU-MARK
- Knickerbocker Publishing to SLC, 10 February 1909 · New York, N.Y. · UCLC38704 CU-MARK
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