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: that Allied pressure in the lower Rhine bridgehead is continually increasing, on March 27; and of evidence that the Supreme Command of the Army is now divided into three echelons located at Zossen, Thuringia and the Salzburg area, on March 19, 20, 22 and 24.