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 contains a message from Brigadier LRC Hollis for the Prime Minister (PM); a BONIFACE summary; and the following reports on the Mediterranean: on the figures for the German personnel transported from Africa, from May 8-13; that a troop convoy is expected at Rhodes on May 20; and a message from the Code and Cypher School (CSS) to Washington, on May 18: that the PM is to see a Japanese diplomatic telegram.