- University of Illinois at Urbana-Champaign, University Library
Cipher. Ownership. 51x76 mm. [cipher:] G P and H. Papal cross [?] with three arms, surmounted on sphere, cipher in center: G P H [?].
- 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