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 Southern Europe: a situation report on the front line in Catania, as at July 21; and that numerous cases of malaria have been reported amongst German units in southern Italy, on July 21; Naval Headlines; and from the Portuguese ambassador in London, on the ambassador's possible resignation, on July 21.