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: Naval Headlines, detailing that the Koeln sailed from Kristiansand on July 14; the Japanese minister in Madrid reports the possibility of Ciano visiting Spain, on July 10; the Turkish chargé in Kuibyshev reports a discussion with the U.S. ambassador on the prospects for a second front, on July 13; and the Turkish chargé in Kuibyshev reports an impending Japanese attack on Russia, on July 14.