Addressees: Mullen, Barbara
- SLC to Barbara Mullen, 20 May 1901 · New York, N.Y · UCCL06058
- SLC to Barbara Mullen, 30 May 1901 · New York, N.Y · UCCL06065
- SLC to Barbara Mullen, 12 December 1902 · Riverdale, N.Y · UCCL06514
- SLC to Barbara Mullen, 17 November 1905 · New York, N.Y · UCCL07211
- SLC, Isabel V. Lyon to Barbara Mullen, 14 June 1906 · Dublin, N.H · UCCL07458
- SLC to Barbara Mullen, 1 January 1907 · New York, N.Y · UCCL11543
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