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: that German railway travel behind the central Russian Front was endangered by partisan attacks, on May 15; a German Air Force (GAF) supply return for May 15; that the Italian armed forces in Africa requested an air photo mosaic from the Germans, on May 15; that an automatic meteorological station is to be set up [at Spitzbergen] on May 15; on Ciano's response to letters from the Grand Mufti and Gailani, quoted by the Japanese ambassador in Rome, on May 12; that Vishinsky is querying the Japanese delay in accepting the Soviet ambassador designate, on May 12; the Chilean ambassador in Berlin reports that the Germans are examining Russian poison gas, on May 13; a Turkish report from Rome on Italian perceptions of the war, on May 13; a 10th Air Corps report for May 11, including reports of attacks on British ships in the Mediterranean; and notes to the Prime Minister (PM) from the First Sea Lord (ISL) and the Chief of the Air Staff (CAS).