Release of Information from Captured Documents

COPY No captured German documents, archives or interrogations making reference to the following subjects should be released for publication or downgraded from their present security marking except after prior consultation with S.I.S. and/or M.I.5.:(1) Organisation, personnel or activities of S.I.S., S.O.E. or M.I.5., or of foreign intelligence, sabotage or security services which work or worked in liaison with S.I.S., S.O.E. or M.I.5. (2) Cryptographic matters of any shape or kind. (3) Soviet clandestine intelligence and sabotage services.