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: a BONIFACE report from Brigadier Jacob for the Prime Minister (PM); a BONIFACE report for Mr Loxley; a SUNSET intelligence report for November 15; on South-east Europe: that a situation report on Leros is critical for the Germans, on November 15; a situation report on Leros for November 15; that an auxiliary sailing vessel was sunk by a submarine in the northern Aegean, on November 16; and Naval Headlines.