Falconer John, Allanton Steuart. Cryptomenysis patefacta; or, Art of Secret Information Difclofed without a Key

London: D. Brown, 1685. — 180 p.Containing plain and demonstrative rules, for decyphering all manner of secret writing. With exact methods, for revolving secret intimations by signs or gestures or in speech. As also an inquiry into the secret ways of conveying written meltages: and the feveral mysterious proposals for secret information mentioned by Trithemius.