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Estimate: $ 800 - $ 1,200
(CRYPTOGRAPHY.) Wilkins, John. Mercury; or, The Secret and Swift Messenger:shewing, how a Man may with Privacy and Speed communicate his Thoughts to a Friend at any Distance. [16], 180 [i. e. 170], [4] pages, including initial blank and 2 blanks at end. 8vo, 162x109 mm, contemporary calf, spine darkened, chipped at top, covers detached; margin toning and stains. London: I. Norton for John Maynard and Timothy Wilkins, 1641
first edition. " . . . not merely a practical guide in the use and decoding of ciphers, but a broadly based discussion of the means of communication, or what today would be called semiotics"--DSB XIV, 365. Wing W2202.
