Provenance Online Project:
Cipher table from Cryptomenytices et cryptographiae libri IX by August, Duke of Braunschweig-Lüneburg (1579-1666)
Provenance Online Project:
Whiskey cipher puzzle solved by Charles Mendelsohn in Cipher Stories Puzzle Book by Kenneth S. Cooper
Provenance Online Project:
Cipher volvelle on toilet paper created by Charles J. Mendelsohn for his use while studying Aloys Meister's Die Geheimschrift im Dienste der Päpstlichen Kurie
Provenance Online Project:
Engraved title page of Cryptomenytices et cryptographiae libri IX by August, Duke of Braunschweig-Lüneburg (1579-1666)
Provenance Online Project:
Cipher wheel from Gabriel de Collange's translation of Polygraphiae Libri VI by Johannes Trithemius (1462-1516)
Provenance Online Project:
Charles Mendelsohn's annotated copy of The American Black Chamber by Herbert O. Yardley
Provenance Online Project:
Volvelle from Porta's De Furtivis Literarum Notis