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: Naval Headlines; of instructions from the Japanese Ministry of Foreign Affairs to their minister in Santiago, for an approach to the Chilean President prior to his visit to the U.S., on October 1; and from the Japanese ambassador in Rome, giving Italian views on the war, as of October 2.