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NOTE ON YGLLOW: This communication and its enclosure are being classified because unauthorized disclosure would tend to identify our source which could result in exceptionally grave danger to the Nation, This material was furnished by N¥ 694-S* who obtained it from Pearl Wedro, in charge of North America for the World Federation of ‘trade Unions, Prague, Czechoslovakia. This information is contained in New York airtel dated 7-17-61 captioned "SOLO, IS-C." See Memorandum Baumgardner to Sullivan dated 7-21-61 captioned "Solo, Internal Security ~ Communist," FEF:biw,