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Published by E. P. Dutton and Company, New York, 1922
Seller: Ground Zero Books, Ltd., Silver Spring, MD, U.S.A.
Condition: fair to good. 192, tables, biblio, pencil notes on a few pgs, darkening ins bds & flyleaves, board & spine edges worn, board corners worn & bumped. Small paper slip tipped in at title page with publication information. Part I contains a description of the principal systems of cryptography, along with the role played by cryptography in history; Part II gives examples of a dozen cryptograms of various kinds which the author deciphered. The last part, by the translator, discusses the Playfair Cipher System.