Government Code and Cypher School: Signals Intelligence Passed to the Prime Minister, Messages and Correspondence

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 correspondence: from the Japanese minister in Madrid, on the defection of Italy, on July 30; from the Japanese ambassador in Rome, on the Italian situation, as at July 31; from the Japanese ambassador in Vichy, on the Italian crisis, on July 31; from the Brazilian minister in Ankara, relaying the Turkish view of the Italian situation, on August 3; and from the Turkish ambassador in Berlin, describing the Allied bombing of Hamburg, on August 2.