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 reports: a Naval Headlines report on German U-boat activities in the Atlantic and German convoy attacks in the Barents Sea; a report that the Italian ship Gritti would leave Naples for Tripoli on September 4; and a naval report on the activities of the German cruiser Admiral Scheer.