Sources: IaCrM
- SLC to J. H. Pottenger, 25 March 1868 · Unknown place · UCCL10666 IaCrM
- SLC per Franklin G. Whitmore to Theodore S. Parvin, 18 March 1890 · Hartford, Conn · UCCL00594 IaCrM
- SLC to Mary E. (Mollie) Clemens, 11 December 1897 · Vienna, Austria · UCCL05320 IaCrM
- SLC to Mollie Clemens, 16 May 1898 · Vienna, Austria · UCCL11916 IaCrM
- Unidentified to SLC and OLC, 5 December 1898 · UCLC49876 IaCrM
- SLC to Theodore Sutton Parvin, 1 September n.y. · Elmira, N.Y · UCCL09041 IaCrM
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