Draft minute drawn up by [Edward Marsh, Private Secretary to Winston Churchill, First Lord of the Admiralty] and annotated by Churchill and [?] Admiral of the Fleet 1st Lord Fisher [1st Sea Lord] drawing up the system for continuous monitoring and analysis of de-coded German signals, with memorandum from the director of naval intelligence, Captain [William] Reginald Hall, to Vice-Admiral Henry Oliver, Chief of Admiralty War Staff, adding his proposals.