On Secret Marks of Letters
De occultis literarum notis
Porta, Giovanni Battista della
First Translation
No prior complete English translation of this text has been found.
Extensive searches across multiple catalogs (including local scholarly catalogs, Internet Archive, and OpenAlex) yielded no evidence of an English translation of Giambattista della Porta's 'De occultis literarum notis'. While the work is historically significant in the field of cryptography, it appears that no complete or partial English translation has been published. The metadata enrichment suggestion of a 1997 J.W. Trask translation could not be verified in any of the searched databases.
Verified Mar 30, 2026 via local catalogs, google books, open library, internet archive, openalex · methodology
About This Book
Step into the hidden world of Renaissance espionage with Giovanni Battista della Porta’s masterwork on the science of secrecy. From invisible inks and ancient military stratagems to the invention of the mechanical cipher wheel, this text reveals how logic—not magic—allows the mind to communicate across enemy lines.
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