Government Code and Cypher School: Signals Intelligence Passed to the Prime Minister, Messages and Correspondence

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 the Russian Front: a ground situation report for November 4 for the Crimea, including superior Allied forces being south of Perekop, on November 4; and of orders that the Kertch Straits should be held from the Russians, on November 3; and Naval Headlines.