Vol. IV (ff. 190). 1916-1918.
- ff. 1-90 Arthur James Balfour, 1st Earl of Balfour; Prime Minister: Correspondence with Lord Jellicoe: 1915-1916: Signed and drafts.
- f. 99 Admiral of the Fleet Sir Henry Francis Oliver, KCB: Minutes, etc., by: 1916, 1917: Partly typewritten.
- f. 99 Admiral Sir Alfred Dudley Pickman Rogers Pound, KCB: Minute by: 1917.
- ff. 99, 107-118 Admiral Sir George Price Webley Hope, KCB: Minute, etc., by: 1917: Partly typewritten.
- ff. 120-181 passim Admiral Sir Frederic Charles Dreyer, GBE: Minutes, etc., by: 1916-1918: Partly typewritten.
- ff. 149-151 Sir Eric Campbell Geddes, GCB: Memorandum on Admiralty organisation: 1917: Printed.
Almost all of the correspondence is dated 1916-1917.
Correspondence relates to Naval strategy and the progress of the war, including discussion of: mines, mine-laying and mine-sweeping; merchant shipping and armament; strikes and labour troubles; possible naval offensive against Germany; shipbuilding and ship repairs; the Royal Naval Air Service (RNAS) and the possibility of creating a separate air service; the possession of Heligoland; the submarine threat and anti-submarine inventions, suggestions and tactics; details of German submarine construction; Navy staff changes and organisation; proposals by Churchill for operations in Heligoland Bight; and munitions including depth charges, shells and guns. Includes hand-drawn diagram of König ship and diagram of the impact of shells on targets. Also includes Jellicoe’s recommendations of officers to be honoured after the Armistice.