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Information Disclosed without a Key. Containing, Plain and Demonstrative Rules, for Decyphering all Manner of Secret Writing. With Exact Methods, for Resolving Secret Intimations by Signs or Gestures, or in Speech. As Also an Inquiry Into the Secret Ways of Conveying Written Messages: and the Several Mysterious Proposals for Secret Information, Mentioned by Trithemius, &c.
Printed for Daniel Brown, London 1685 - Hardcover. Small octavo. (lacks front blank: I -II) (III - XXIV), 180pp. Mid twentieth century black buckram library binding with gilt titling and shelf number to spine. Various tables and diagrams in-text. A rare early work on cryptography or codebreaking in which the author . In addition to offering a method of cracking the then reputably unbreakable Vigenere cipher, the author reviews various codes and ciphers, and explores the way to crack them, as well as reflecting on Trithemuis and the "Steganographia." Slightly leaned, ex-library, but with very few markings: stamped shelf number on spine, glue residue (from removed label) and erasure on front free endpaper, a few small library marks on verso of title-page. No other library marks. Previous owner's name stamp on title-page, which is laid down and reinforced at inner margin. A little closely cropped at fore-edge: no loss and only a few pages affected; a couple of words rubbed in the header of A3. One or two flecks, and a little greying to the pages throughout. Still a very nice copy, complete but for the first blank, which is more than worthy of being given a more sympathetic binding. [Attributes: First Edition; Hard Cover]
      [Bookseller: Weiser Antiquarian Books, Inc.]
Last Found On: 2018-01-09           Check availability:      AbeBooks    

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