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 Helsinki, on German-Russian peace rumours, from June 7; the Japanese ambassador in Berlin issues a liaison mission report on the Axis situation and relations with Japan, for June 7; and from the Portuguese minister in Tokyo, describing Japanese uneasiness, on June 9.