ABSTRACT
On 14 June 1946 Canadian military intelligence received a frantic request from Colonel R.E.S. Williamson, the American military attaché in Ottawa. What top-secret military information had Soviet agents in Canada turned over to the USSR? Not surprisingly, the Americans were most concerned about atomic energy matters. Specifically, they wanted to know whether the Soviet Union had been able to obtain information about the Manhattan Project,' any samples of uranium 235 or plutonium . . . . (or) any plans or drawings showing bomb construction. . .?' * By the same token the Americans had searching questions about a number of other advanced weapon systems.These were categorized by Williamson as follows:
Explosives: 'What did the U.S.S.R learn of methods of manufacture of explosives such as RDX?'
Guided Missiles: 'What information did U.S.S.R. obtain on U.S. or British developments in the field of guided missiles?'
Electronics and Proximity Fuses: 'What data was obtained from the Canadians on "the U.S. Navy electronic shell", i.e. proximity fuse?'
Chemical Warfare: 'What information did the U.S.S.R. obtain on the German nerve gases?' 1
