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: BONIFACE reports from Brigadier Hollis to the Prime Minister (PM); from the Japanese ambassador in Rome, on the Italian situation, as at August 3; and from the Japanese ambassador in Berlin, describing Allied air-raids on Hamburg, on August 3.