Government Code and Cypher School: Signals Intelligence Passed to the Prime Minister, Messages and Correspondence

A.M. FORM No. 1479 TOP MOST SECRET ULTRA TO BE KEPT UNDER LOCK AND KEY AND NEVER TO BE REMOVED FROM THE OFFICE. THIS FORM IS TO BE USED FOR AIR INTELLIGENCE MESSAGES ONLY. NR. No. GR. No. OFFICE SERIAL. No. DATE TIME OF RECEIPT TIME OF DESPATCH SYSTEM TO: FROM: SENDERS No. (T.O.O. 1130/27/6) CX/MSS/T228/59 KV 9839 WEST EUROPE SIGNED TROLL, DIV. H.J., STAMPED 1130/27/6:ENEMY IS ATTACKING ONLY AFTER ARTILLERY PREPARATION LASTING SEVERAL HOURS, WITH SUPERIOR TANK FORCES. FIRECONTROL MOSTLY BY ARTILLERY SPOTTERS.