of the time, Herbert Yardley, is fired. Yardley then goes public and writes a book that explains how the Americans have hoodwinked the Japanese about the numbers and tonnage and the caliber of guns they can use in their capital ships. Duly warned, the Japanese change their codes. Fortunately, the Army is prepared for such weak-kneed predilections of various civilian appointees, even the secretary of state. The Army has secretly kept a second arrow in its quiver. Under the title of chief signal officer, the incredible cryptographer William F. Friedman continues reading the diplomatic mail of
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