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: that the German Air Force (GAF) are to repeat their attack on Oran on May 20; that the GAF are to attack Oran from Sardinia, on the night of May 20-21; that Kesselring orders the transport of aviation fuel to southern Sardinia to be speeded up, on May 17; that Axis tanks are to be transported to central Sicily, on May 18; and a German naval summary for May 18; on the Russian Front: a GAF ground situation report for May 19; and a message from the Code and Cypher School (CSS) to Washington, on May 20: that the PM is to see a Japanese diplomatic telegram.