Sources: CStoC
- SLC to Unidentified, 12 June 1904 · Florence, Italy · UCCL10804 CStoC
- Dora Prentice Mills to SLC, 20 January 1910 · Philadelphia, Pa. · UCLC46351 CStoC
- SLC to Albert Bigelow Paine, 25 January 1910 · Hamilton, Bermuda · UCCL09412 CStoC
- SLC to Arthur Bell, 10 January n.y. · Hartford, Conn · UCCL09411 CStoC
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