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 North Africa: a fragment of a German report for March 16; and on the Russian Front: a 27th Army Corps report and their intentions for March 21; a 27th Army Corps report for March 22 claiming a successful attack; a 46th Panzer Corps report of March 21; a 4th Panzer Army report of March 21; a German ground forces report for March 22; and a German 9th Army Corps report for March 22.