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 on Germany: of Allied air attacks on the night of July 8-9; on South Europe: of German telephone lines on Sardinia being sabotaged on July 7; and a German Air Force (GAF) report for July 8, including reconnaissance of Allied invasion shipping.