Della Porta - De occultis literarum - 1593

Della Porta Giovan Battista

On the secret notes of letters or the art of the mind
Hidden senses indicating to others.

Mont Beliard - 1593 -
Jacques Foillet - Lazarus Zetzner

(8), 275 (i.e. 271) c. 24, (12) p.
In 80 - 17 x 11 cm.

Rare and highly esteemed treatise, fundamental for cryptography and stenography.

A very rare and extremely curious opera.
CAILLET 8856
ADAMS P 1928
RICCARDI II 309

Important treatise in four books dedicated to cryptography, stenography, and message interpretation, also analyzing ancient methods.

Contains, on the table, à la carte ()8.
The three volvelle (movable parts) intended to be cut out and applied to the pages f6v, g1v, and g4r.

One of the earliest and most detailed works dedicated to codes and secret writing systems.
Furthermore, it is one of the first books printed in Mont Beliard by Jacques Foillet, the city's first printer, whose activity began only in 1588.

Considered, together with Tritheim's 'Polygraphia,' the most important treatise.
about the topic

Giovan Battista Della Porta (1535/1615), an Italian scientist, alchemist, and cabalist, is mainly remembered for introducing a new use of the keyword, which has been preserved over time: it assigns each letter of the keyword to a single letter of the plaintext.
Additionally, analyze the ancient methods for making a message unreadable to unauthorized readers.

The work is extensively illustrated with examples of unreadable alphabets, symbols, and hieroglyphs, along with decipherment tables.

Modern half parchment binding with corners and a large patch in red Morocco leather, with the author and title gilded.
Rigid sprayed dishes.

Excellent preservation of the interiors, with neat and clean materials.
No defects to report other than a slight, natural browning of the cards.
Beautiful illustrations, tables, and codes, all well inked.
Modern guards

Excellent copy, complete in every part.
Settled. Complete.