- University of Illinois at Urbana-Champaign, University Library
Pictorial. Ownership. 62x105 mm. De profundis. / [monogram] HER BOOK. Flying fish. Motto: De profundis (out of the depths). Owner's cipher contains an H and other letters, possibly T, E, W and/or C.
- Rare Book and Manuscript Library, University of Illinois at Urbana-Champaign; For more information, please contact the Rare Book and Manuscript Library: https://illinois.edu/fb/sec/7016277