Syllabical and Steganographical Table

Syllabical and Steganographical Table (French: Tableau syllabique et stéganographique) is an eighteenth-century cryptographical work by P. R. Wouves.

Published by Benjamin Franklin Bache in 1797, it provided a method for representing pairs of letters by numbers.

It may have been the first chart for cryptographic purposes to have been printed in the United States.

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English version cover page, 1797
French version cover page, 1797