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, covering Italian activity; from the Japanese chargé in London on anti-Japanese feeling; a German proposal to prolong the anti-Comintern pact; and from the Turkish ambassador in Washington on U.S.-Japan relations, from October 26.