The author has been a civilian employee of the New York Police Department for a number of years, first as an attorney in the Legal Bureau and presently as a Survey Officer. In his present position he has charge of the responsibility of management analysis. Furthermore, over the years Mr. Chess has been interested in and active in the decipherment of gambling ciphers. His present paper was presented to the Academy of Police Scientists and Administrators, New York City, last April.-EDIToR.
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Abraham P. Chess (1960) studied this question.
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