Addressees: Blackmer, Helen K
- SLC to Helen K. Blackmer, 22 September 1908 · Redding, Conn · UCCL08109 CU-MARK
- SLC to Helen K. Blackmer, 3 March 1909 · Redding, Conn · UCCL08359 CtY-BR
- SLC to Helen K. Blackmer, 13 March 1909 · Redding, Conn · UCCL08373 CtY-BR
- SLC to Helen K. Blackmer, 13 October 1909 · Redding, Conn · UCCL08468 CtY-BR
- SLC to Helen K. Blackmer, 30 October 1909 · Redding, Conn · UCCL08481 CtY-BR
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