A file of signals intelligence reports, messages, and correspondence issued by the Government Code and Cypher School and sent by the head ('C') of the Secret Intelligence Service (MI6) to the Prime Minister, Winston Churchill. This file includes the following report on the Southern Russian Front: of German Air Force (GAF) operational orders for July 29 and the night of July 29-30; and the following messages from the Italian ambassador in Turkey on Turkish foreign policy, as of July 21; and from the Turkish chargé in Kuibyshev on the war in Russia, as of July 25.