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 on Southern Europe: a situation report on Sicily for July 19; on the Russian Front: that the main effort by the 4th Air Fleet on July 19 is on the Mius Front; and an advanced diplomatic message from Rome to the Ministry of Foreign Affairs in Sofia, reporting the effects of an Allied air attack on Rome, on July 19.