(CRYPTOGRAPHY.) [Falconer, John.] Cryptomenysis Patefacta; or, The Art of Secret Information disclosed without a Key. [22] (of [26]), 180 pages; lacks the blanks A1 and A8. 8vo, 164x98 mm, contemporary calf, rebacked, front joint worn and starting, endpapers renewed, hinges reinforced; title conspicuously rehinged, paper flaw in C1 and C2 affecting a few letters, marginal dampstaining toward end. Faint stamp of the Royal Society in lower margin of title; armorial bookplate of Henry Dircks. London: Daniel Brown, 1685