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; from the Japanese minister in Berne, that the Three Powers are divided in Europe, but determined against Japan, on May 18; and from the French ambassador in Moscow, describing the Soviet press campaign on Germany, on May 21.