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  1. Manual for the Solution of Military Ciphers

    Parker Hitt

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    Parker Hitt
    Manual for the Solution of Military Ciphers
  2. The Robinson Telegraphic Cipher
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    Stephen L. Robinson
    The Robinson Telegraphic Cipher

  3. La Cryptographie, ou, l'art d'écrire en chiffres

    P. L. Jacob

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    P. L. Jacob
    La Cryptographie, ou, l'art d'écrire en chiffres
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