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: a Naval Headlines report on Italian activity; the Japanese ambassador in Buenos Aires reports the German chargé's views on the Brazilian situation on March 19; and the Spanish ambassador in London reports on rumours of an Allied landing on the continent, on March 20.