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 messages: 1526/T7 was sent to the Director of Military Intelligence (DMI) under 1067 (an extract); from the Greek ambassador in Ankara, that German pressure on Turkey has been eased by the Soviet stabilisation of the Russian Front, on October 12; and a Naval Headlines report that a German armed merchant raider has been sunk off Cherbourg.