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TO: THE DIRECTOR

FROM: MR. LADD

SUBJECT:

ESPIONAGE — R



''This memorandum is designed to give you a concise picture of the developments in this case in our investigation of Soviet espionage in the United States, based on information from. The period covered by information is only from April, 194,4 to May, 1945. However, our investigation has shown that many of the MGB agents involved continued their activities through a much later period. It would appear from available information that the main fields of Soviet interests were in (a) United States atomic energy and other scientific developments; (b) infiltration of the United States Government agencies; and (c) infiltration of Trotskyite and White Russian activities. There is attached a memorandum to the field instructing them to follow this matter closely.''



''You may recall that from time to time you have furnished memoranda in this case designed to give you an  all view of activities of the MGB (Soviet intelligence)  on information from. This sours has been able to provide us information relating back to the period April, 1944, to May, 1945, regarding Soviet (MGB) operations in the United States. The main limitations on the are that in many instances it is very fragmentary and, in addition, the Soviets' extensive use of code names makes identifications difficult. You will be interested in knowing that based on investigation from the information we have identified 108 persons involved in Soviet espionage activities who have, at one time, been active in the United States. Of this number we already had received information from other sources indicating espionage involvement on 44 of these persons. However, 64 persons were not previously to us as involved in espionage and have been identified through investigation conducted pursuant to this case. A chart explaining this in more detail is set forth on Page ''

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