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 (1694)
Wilkins, John, 1614-1672 · London, Printed for Richard Baldwin · leaf 116
Characters, thatthey are not without fufpicion. For the remedying of which, therehave been fgme other inventions ofwriting by Points or Lines,or Figures,wherein a man would never rmftruftany private melfage 5 there being no-thing to be difcerned in thefe kinds ofintimation, but only, either fome… … 94 7ke Secret and SwiftBy Mathematical Figures.
Cryptography · Gesture · Sign language
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