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@ , ; e@, . ATED STATES DEPARTMENT Ov JUSTICE FEDERAL BUREAU OF INVESTIGATION In Reply, Please Refer to New York, New York File No. June 28, 1966 Rudolph Ernst Peierls Internal Security - England i . orandum dated March 9, 1966, +t Brookhaven Office (Atomic Energy COommLss ror), 1 Robert E. Tharp, Assistant Director for Personnel Security, Division of Security, Headquarters, entitled "Rudolph Ernst Peierls, UK Scientist,” - which memorandum was classified "Secret." Commission, Brookhaven ice, lurn a copy of this memorandum on March 22, 1966, and made available the data contained in the Atomic Energy Commission files pertaining to captioned individual. Under date of January 4, 1966, Brookhaven National Laboratory (BNL) transmitted a letter to the Atomic Energy Commission, Brookhaven Office, requesting Atomic Energy Commission alien visitor approval for Dr. Rudolph E, Peierls, a British national. This letter indicated that BNL intended to offer an appointment to Dr. Peierls as a temporary employee in the capa- city of Visiting Senior Physicist in the Physics Department effective on or about March 20, 1966, for a period of five weeks. The letter relates that during his stay at BNL, he will engage in unclassified research with the Theoretical Physics Group. S ET DECLASSIFIED BY SOS*RASEY ON (0-4-7977. teed ae oe THIS DOCUMENT CONTAINS NEITHER RECOMMENDATIONS NOR CONCLUSIONS OF THE FBI IT IS THE PROPERTY OF THE FBI AND IS LOANED TO YOUR AGENCY; IT AND ITS CONTENTS ARE NOT TO BE DISTRIBUTED OUTSIDE YOUR AGENCY, PNGLOSULA (yo - Bo he / b