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@ 7 ‘ iad . - a — Pre. SAC, Fashington Field "July 28, 1952 Director, FRI ' DONALD DUART MacLEAN, et a2 ESPIONAGE «= R There ts betng transnitted herewith for your thforma= tion a copy of e coummuntcction received from the Atoate inergy Commission, Fashington, Dy Cey dated July 10, 1951, You wtl2 note thet thts letter containa tnfernation reflecting in some detail the extent of damage whitch might hove been done through ' MaoLean's poastble defection, by reason of his knowledge of mattera dealing with atomic energy as gained through his having represented the Srititsh imbossy during 2947 and 1348 in matters dealing with the political aspects thereof and through his work on the Combined Development Agency. The above ts bhetng passed on te you for your confidential — tnformettone Lo ga at me .