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 contains a message from C to the Assistant Chief of Air Staff Intelligence (ACASI): regarding a query from the Prime Minister (PM) relating to comments on air raids on Northern Italy, made in a report from the Japanese chargé in Rome, attached, together with a reply from the Chief of the Air Staff (CAS).