Statement by WSC to the French Admiralty on joint submarine warfare and the success of "ASDIC" [anti-submarine detection indicator]; the need for larger ships to oppose the Bismarck and continue the protection of trade routes.

Letter from WSC to Sir Alexander Cadogan [Permanent Under-Secretary of State for Foreign Affairs] on replacing Sir Hugh Sinclair as Chief of the Secret Intelligence Service with Captain [Gerald] Muirhead-Gould RN; also the need to improve Admiralty intelligence services, with note to Private Secretary on distribution. [carbon and draft].

Letter from Sir Alexander Cadogan [Permanent Under-Secretary of State for Foreign Affairs] to Sir Archibald Carter [Permanent Secretary of Admiralty] asking for nominations from WSC and [Admiral of the Fleet Sir] Dudley Pound [1st Sea Lord] for Admiral [Sir Hugh] Sinclair's replacement as Chief of the Secret Intelligence Service.

Letter from Lord Halifax [earlier Edward Wood and Lord Irwin, Foreign Secretary] to WSC offering advice on a statement to the House of Commons on damage inflicted by German submarines; with letter of thanks from WSC to Halifax.

Letter from Admiral of the Fleet [1st] Lord Chatfield [Minister for Co-ordination of Defence] to WSC asking him not to mention Chatfield's involvement in the Royal Oak case; with acknowledgement.

Letter from WSC to Prime Minister Neville Chamberlain on discussions arising from "the Nelson affair" [the damaging of HMS Nelson by a magnetic mine]. [carbon].

Letter from King George VI (Buckingham Palace) to WSC congratulating him on countering German aggression towards Scandinavia and requesting a meeting to discuss naval affairs. [in the King's hand].

Letter from [Rear-]Admiral Sir Bruce Fraser [Controller of the Navy] to WSC, criticising the evacuation of Central Norway and giving advice on future Scandinavian movements [annotated "First Lord saw Controller 30/4/40"]; with covering letter from "E A S" [Eric Seal, Principal Private Secretary to First Lord of the Admiralty] to [Arthur] Rucker, [Principal Private Secretary to Prime Minster Neville Chamberlain]. [annotated "recalled before it was shown to the Prime Minister"].

Letters from [Sir Roger] Keyes to WSC and [Prime Minister] Neville Chamberlain on widespread dissatisfaction with the waging of the naval war, and the recent lack of success at Trondheim fjord and Steinkjer [Norway], mentions previous disasters in the World War I, and intrigue in the intervening years by [Admirals Sir Reginald] Bacon, [1st Lord] Jellicoe, [1st Lord] Beatty, [Sir Charles] Madden and especially [Sir Dudley] Pound [1st Sea Lord and Chief of Naval Staff].

Letter from WSC to Prime Minister Neville Chamberlain with thoughts on future action relating to Germany, advising against immediate bombing raids, commenting on supplies of artillery and munitions, and offering suggestions for the development of the Navy and Army. [carbon, with manuscript annotations by WSC].

Letter from WSC to Prime Minister Neville Chamberlain reporting on recent military and naval engagements, particularly to HMS Exeter's fight with the Graf Spee, and the arrival of major Canadian convoy. [carbon, with manuscript annotations by WSC].

Letter from WSC to Prime Minister Neville Chamberlain reporting success against magnetic mines, expressing concern about American isolationism and possible German interests in Scandinavia. [carbon, with manuscript annotations by WSC].

Letter from WSC to Admiral Sir Charles Forbes, Commander-in-Chief Home Fleet, offering congratulations on recent Naval victories off the Norwegian coast; mentions HMS Rodney, Illustrious and Suffolk; [Vice-]Admiral [Cedric] Holland, [Major-]General [Pierse] Mackesy and [Admiral of the Fleet, 12th] Lord Cork [and Orrery]. [carbon, with manuscript annotations by WSC].

Letter from WSC to General [Jan] Smuts [Prime Minister of South Africa] on naval defence of South Africa and the position of the Monitor HMS Erebus. [carbon].

Memorandum from WSC on "Publicity regarding destruction of or damage to enemy submarines, British warships and merchant vessels".

Typed memorandum with printed note by WSC on the Northern Barrage (mines), explaining the policies behind British Fleet manoeuvres.

Printed memorandum from WSC enclosing the narrative of survivors of HMS Rawalpindi and a diagram charting movements during the attack.

Cutting from Mayfair magazine featuring an article entitled "Churchill and the Admiralty", praising WSC's changes in staffing and tactics.

Telegram from WSC to Captain [Philip] Vian, HMS Cossack, giving orders to board the Altmark, liberate prisoners and if fired upon by Norwegian torpedoes follow enclosed orders. [typescript, with manuscript annotations, and copies].