Codes, Ciphers and Spies by John F. Dooley
Author:John F. Dooley
Language: eng
Format: epub
Publisher: Springer International Publishing, Cham
The prisoner has to depend upon the keenness of the person who receives his letter to find out that he has written a message by using the first and last words and middle words of alternating lines to express what he has to say. Undoubtedly the attention of any intelligent person would have been arrested by the odd and almost silly character of the first half of the letter. The writer expected this, and the occurrence of such words as “treat,” “ink,” “writing,” and “finish” to induce his correspondent to study out the system. It will be seen that the middle, first, and end words taken in proper order read:Treat this letter with solution
half ink with half water in a
dish. Just dip the sheet till
immersed then remove and writing
should appear. Finish.
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