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 on Japan: a Japanese Foreign Office Far East situation summary on November 21; from the Japanese consul in Hong Kong: on Chinese views on U.S.-Japanese negotiations on November 15; on Japan: the Chinese puppet government is to join the anti-Comintern pact, from November 17; from the Turkish ambassador in Washington on U.S.-Japanese conversations, on November 17; from the Japanese minister in Madrid: Spanish perspectives on the war on November 17; on Japan: Japanese intentions on China in the event of the collapse of U.S.-Japanese negotiations, from November 14; and Naval Headlines, covering German and Italian activity.