Papers relating to early naval career, 1872-1907 including midshipman's log books; papers relating to service as Director of Naval Intelligence, 1909-1912, Commander-in-Chief, East Indies, 1911-1918, commander of Royal Naval War College, Portsmouth, 1913-1914, commander of 3 Battle Fleet and Channel Fleet, 1914-1915 and Commander-in-Chief, Plymouth, 1916-1918; correspondence with Adm Sir Alexander Duff, 1917-1918, AF Lord Fisher, 1909-1918 and AF Lord Jellicoe, 1913-1918; personal papers and correspondence, 1865-1932; miscellaneous papers, 1901-1911; correspondence between the family and researchers using the papers, 1935-1979.

Papers relating to Bethell's life and career, [1898]-1927, and to his death in action, near Epehy, France, 21 Sep 1918, including letters and telegrams of condolence to Bethell's parents, notably from HM King George V, Brig Gen Charles Robert Graham Mayne, commanding 19 Infantry Bde, and Brevet Lt Col Percy Charles Esdaile, Commanding Officer, 1 Bn, The Queen's (Royal West Surrey Regt), 1918; photograph of Bethell's grave, Epehy Wood Farm Cemetery, France [1920]; seven photographs of Bethell [1898-1918]; Capt Bethell's Record of Services book, 1911, and the official scroll, sent to the next of kin of servicemen killed in action [1919]; letters from the War Office, the Directorate of Graves Registration and Enquiries, and the Imperial War Graves Commission relating to Capt Bethell's death, gravestone and location of cemetery and grave, 1918-1927; letter to Adm Hon Sir Alexander Edward Bethell from Maj George Nowers Dyer, Commanding Officer, Depot, The Queen's (Royal West Surrey Regt), Guildford, Surrey, relating to the collection of photographs of the Regiment's officers killed in World War One, for inclusion in the Regimental Museum, Nov 1923.

Copy of single letter from Biddulph to a Mr Fanshawe, 13 Jun 1904, commenting on recent administrative changes at the War Office, in comparison with reforms to the British Army proposed by Edward Cardwell, Viscount Cardwell, Secretary of State for War, 1868-1874.

Printed 'Report of the Board of Enquiry appointed to enquire into the circumstances in which the German Battle Cruisers (SCHARNHORST and GNEISENAU) and Prinz Eugen proceeded from Brest to Germany on 12th February, 1942, and on the operations undertaken to prevent this movement', Mar 1942, relating to Operation CERBERUS or the 'Channel dash', with typescript covering letter from Binney to AF Sir (Alfred) Dudley (Pickman Rogers) Pound, Mar 1942.

Look back with pleasure', typescript memoirs covering his life and career, 1897-1965, notably his service in Mesopotamia and Palestine, 1915-1918, India, 1919-1925 and 1957-1962, Africa, 1939-1944, Germany, 1945-1950, and Cyprus, 1964-1965, written in 1971.

Copies of papers relating to her work as an WRNS administrator at Bletchley Park Decoding Centre, notably two drafts of a text on WRNS at Bletchley Park, [1945], an account of the employment of WRNS at Bletchley Park and outstations, [1945]; copy photograph of Blagrove and her assistant Doreen Scott, [1944], and photocopies of photographs of buildings and WRNS personnel at Walton Hall, Wavenden, Gayhurst and Eastcote, 1944-1945; copies of papers relating to a reunion of ex-HMS PEMBROKE V WRNS personnel, 1978, notably a text of Blagrove's speech on HMS PEMBROKE V and an attendance list; copy of obituary from The Wren, Jun 1979.

Proof copy of article on his military career, 1915-1944, notably concerning his experiments with the transmission and interception of wireless messages and radar, [1962].

Copies of papers, 1909-1974, comprising typescript copy of the 'Interim Report of the Advisory Committee for Aeronautics', 1909; night order book, HMS THESEUS, Korea, 1950-1951; newspaper cuttings on HMS THESEUS' departure from UK to Korea and subsequent return, 1950-1951; typescript transcript of Royal United Services Institute for Defence Studies lecture by Bolt, Oct 1951, entitled 'HMS THESEUS in the Korean War and some special problems of naval aviation in that theatre' (subsequently published in the Journal of the Royal United Services Institute for Defence Studies; standard circular letters to all retired admirals, containing Royal Navy news and information, from Chief of Naval Staff and First Sea Lord Adm Sir Varyl (Cargill) Begg, 1966-1968, Adm Sir Peter (John) Hill-Norton, 1971, and Adm Sir Michael (Patrick) Pollock, 1972-1974; article by Bolt on minesweeping in 1940-1941 by Vickers DWI (Directional Wireless Installation) Wellington aircraft entitled 'Minesweeping Wellingtons: Part 1: equipment and technique: early operations in the Thames Estuary', published in Air Pictorial (Apr-May 1979), with nine uncaptioned photographs of Wellington aircraft and a captured German magnetic mine.

Copy of account of the Survey Service of the Eastern and 14 Army in India and Burma during the period 1942-1945, written in 1945.

Report to the Director General of Medical Services, Surgeon Gen Sir Arthur Sloggett, on the introduction of steel helmets, 1916.

Copies of three letters to his family describing action at Gallipoli, Aug-Sep 1915.

Reporting on the effectiveness of RAF officers', a paper on personnel assessment in the RAF, 1957, with covering letter to Senior Personnel Staff Officer, Far East Air Force HQ, 1957.

Papers including maps, relating to operations of British Expeditionary Force in France and Belgium, 1940-1941; Staff College study of Italian campaign, 1915; papers including those by Maj Gen G M Lindsay relating to armoured support for 7 Infantry Brigade, 1933-1934; appendix, including maps of Britain annotated for exercises including SPARTAN, 1943; correspondence dated 1977-1978 with Martin Alexander of St Antony's College, Oxford including Franco-British military relations, 1939-1940; notes of conversation in 1975 with Dr A W J Houghton relating to the evacuation of Dunkirk, 1940.

Copies of papers, 1916-1958, including account of the Battle of Jutland, witnessed by Brind from HMS MALAYA, 5 Battle Sqn, 1916; text of lecture 1919, relating to anti-submarine warfare, 1914-1918, and possible future development; notes, dated 1931, on the conduct of the Dardenelles campaign; report on night fighting by single ships, 1924; night order book, HMS BIRMINGHAM, South East Asia, 1929-1940; report written in 1946 on the sinking of HMS ROYAL OAK, Scapa Flow 1939, by German submarine U47, quoting from U-boat's log; texts of speeches, 1947-1958; letter of condolence from Adm Hon Sir Reginald Aylmer Ranfurly Plunkett-Ernle-Erle-Drax to Edith Blagrove, widow of R Adm Henry Evelyn Charles Blagrove, killed in the sinking of HMS ROYAL OAK 1939, with details of the circumstances of his death; letters home from the Far East, 1949; official report on the blockade of Shanghai and British inability to defend Hong Kong from possible future attack by Chinese Communist forces, 1949; newspaper cuttings relating to the HMS AMETHYST Incident, Yangtze-Kiang river, China, 1949, and Brind's order, as Commander-in-Chief Eastern Fleet, for the successful breakout 1949; notes and lecture texts relating to the role of NATO, 1953-1955; typescript notes on the post war role of the Royal Navy, 1955.

Published booklets from the General Staff, War Office, including two booklets entitled The German Army in Pictures and More Pictures of the German Army, detailing German Army weaponry, uniforms, and insignia, 1941; five guides to the Germany Army detailing the tactics and organisation of armoured divisions, infantry divisions, airborne troops, engineers, and reconnaissance units, 1941; A Guide to the Identification of German Units, detailing badges of rank and service German officers for the purpose of interrogation, 1942; five pamphlets relating to German infantry weapons, Italian infantry weapons, German light anti- aircraft and anti-tank guns, German infantry, heavy anti-aircraft, and divisional artillery; German infantry engineer and airborne weapons, 1941-1943; Periodical Notes on the German Army relating to tactics of the German tank regiment and tank battalion, German Army tactics in Libya, 1941, operations of German 11 Air Corps during the attack on Crete, May 1941, German artillery operations in armoured divisions, and the tactical handling of German armoured divisions, lorried infantry and motorcycle units, 1942; New Notes on the German Army, relating to the evolution of German armoured and motorised divisions, and German supply and administrative services, 1942-1943; two pamphlets relating to the German Army order of battle, 1942-1943; booklet designed to aid British personnel in the recognition of British and Allied Armoured Fighting Vehicles (AFVs), 1942; booklet of vocabulary of German military terms, 1943.

Edition of The Two Types by Jon (William John Philpin Jones), cartoon book produced by the British Army Newspaper Unit, Central Mediterranean Force, and distributed to Allied forces in the North Africa and Italy, 1944; edition of The Two Types in Italy by Jon, cartoon book produced by the British Army Newspaper Unit, Central Mediterranean Force, and distributed to Allied forces in the Italy, 1944; edition of The Story of 46 Division, 1939-1945 (Graz, Department of State and Official Bodies, 1947) with forward by Lt Gen Sir Richard Loudon McCreery, Commander in Chief, 8 Army in Italy, 1944

Copy of typescript letter sent by Sir John Gerald Lang, Permanent Secretary of the Admiralty, to V Adm Sir William Gerrard Andrewes, Commander in Chief, America and West Indies Station, regarding the efficiency of the cryptographic staffs of HMS SUPERB and HMS SNIPE during naval operations in the Antarctic, 13 Apr 1953