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 situation report from the 4th Air Corps on September 17 of heavy fighting in the pocket east of Kiev; and a Naval Headlines report that the Pietrino convoy was attacked on September 17 and the Feluccio sunk, and that HMS Ark Royal and other ships returned to Gibraltar on September 15 and 17.