TheCodeBreakers
Britain had about 30,000 persons in communications intelligence.
Deputy director of the Department of Communications was a man who
had already made a mark in the world by his cryptanalytic efforts. He
was Nigel de Grey, who in 1917 had solved the Zimmermann telegram.
The department turned out solutions at a fairly rapid
I
rate. On November 21, 1941, a Japanese diplomatic solution was
given number 097975; on December 12, another Japanese diplomatic
solution was numbered 098846;— indicating almost 300 solutions a
week at that time (not Japanese alone, of course). A typical distribution
of these solutions would send three copies each to the director of the
department, the Foreign Office, and the War Office, two to the India
Office, and one each to the Admiralty, the Air Ministry, the Colonial
Office, the Dominion Office, M.I. 5 (counterintelligence), and Sir Edward
Bridges, secretary to the Cabinet. The appearance of Bridges' name on
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