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: Naval Headlines, covering German measures against Arctic convoys, an Italian cargo bound for Tobruk and Spanish activity; from the Japanese ambassador in Istanbul, of Arab information on Egyptian and Iraqi affairs, for September 7; and from the Spanish ambassador in London, on Churchill's talks with Stalin, from September 7.