Writing Secret Codes and Sending Hidden Messages by Gyles Brandreth, Peter Stevenson

Writing Secret Codes and Sending Hidden Messages

Gyles Brandreth, Peter Stevenson

127 pages first pub 1984 (editions)

medium-paced
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Description

Explains how to use secret codes, including Morse, Caesar's, Sandwich, Rosicrucian, and others, as well as how to send hidden messages using invisible ink, how to take fingerprints, and other tricks and techniques.

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