Sources: MiK2
- SLC to Marjorie Breckenridge, 19 September 1908 · New York, N.Y · UCCL07980 MiK2
- SLC to Marjorie Breckenridge, 7 October 1908 · Redding, Conn · UCCL08126 MiK2
- SLC to Marjorie Breckenridge, 1 December 1908 · Redding, Conn · UCCL08167 MiK2
- SLC to Marjorie Breckenridge, 26 May 1909 · Redding, Conn · UCCL08402 MiK2
- SLC to Marjorie Breckenridge, September 1909 · Redding, Conn · UCCL08690 MiK2
1