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 Western Europe: of a penetration by the Allies, on March 19; a situation report by an unspecified division, for March 19; of probable indications of an impending German parachute operation, on March 9 and 17; Naval Headlines; from the Japanese ambassador in Berlin, describing the German military situation, on March 15; from the Ministry of Foreign Affairs in Berlin, on the Japanese political situation, as of March 13; and from the French delegate in Stockholm, on the possibility of an Allied invasion of northern Germany, on March 12.