Lexicon of secret writing
Subtitle: how to write it and how to read it, also, cipher writing and double writing, also, the art of signalling & silent conversation ... with part II, Zulu key word, heliographic instructor, electric time tables
By: by John Jacob.
Contributors: George Fabyan Collection (Library of Congress)
Publisher: M.H. Gill & Son; D. Irvine
Published: 1879
Place of publication: Dublin; Londonderry
Language: eng
Number of pages: 76
Subjects: Cryptography.; Ciphers.
Notes: LC copy is item no. 382 of the George Fabyan Collection.