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 correspondence: from Madrid to the Spanish ambassador in London, on the line he should take regarding Spain's position, on July 21; and the following reports on Southern Europe: that a bomber unit is to be brought to central Italy from Germany, on July 21; and SHARK: reporting success on July 16.