De Furtivus Literarum Notis

By Giambattista Porta. A book on cryptology, first published 1563. See Porta's De furtivis literarum notis (1563) [Cryptiana.web]. A scan of the first edition in Latin as available at the Internet Archive.

Dr. Henry Armitage consulted the work when attempting to decipher Wilbur Whateley's diary. [HPL Dunwich (online text)]

There was a copy in the library of Dr. Jean-Francois Charriere. [AWD Survivor (online text)]

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