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: from the Japanese ambassador in Berlin on a meeting with Ribbentrop on the war situation, from January 15; a report from the Japanese ambassador in Ankara on Turkish suspicions of the U.S.S.R., from January 26; and a report from the Italian ambassador in Ankara on the possibility of Turkey joining the Allies, from January 26. The following items are not included in this file: ZTPI/5263 (658/1; sent to the Director of Military Intelligence (DMI) under C/8618); 100578; 100594; 100597; and a summary of Naval messages No. 208. Items 100531 and 100519 are not listed on the coversheet, but are present. Item C/8613 of January 28 is present, but the 10 listed items are not included.