Paris: Aux Frais de l’Auteur, 1857. Second edition under this title; the first appeared in 1840. 8vo, contemporary pebbled morocco gilt spine, green vellum tips, marbled boards, 259,  pages. Lithographic frontispiece portrait. Spine a bit chipped at the head, joints rubbed with some cracking near the head of the spine; some light rubbing to the boards; some foxing, generally in the prelims; a very good copy. Item #18583
On solving substitution ciphers, with tables of frequency for letters in different languages, lists of words of specific lengths with doubled letters of various length, etc. Vesin appears to have published his first book on cryptography in 1838 under the title Traité d’obscurigraphie (Paris, 1838), followed by an edition of La cryptographie devoilée (Bruxelles, 1840) and a Resumé de la cryptographie devoilée (Florence, 1844), as well a companion edition in Italian published in Florence the same year. This edition appears to have dropped the Flemish/Dutch section present in the 1840 edition and substituted Spanish. Galland, An Historical And Analytical Bibliography Of The Literature Of Cryptology (Cryptography), pages 191-192: “This work contains considerable information concerning methods of deciphering, process of cipherment, and statistical data.”.