Papers relating to early career, including material on early aviation, 1911-1913, and texts of lectures given at the RAF Staff College, Andover, 1922-1926. Material relating to post as Air Officer Commanding, British Forces in Iraq, 1928-1935, including correspondence, memoranda and telegrams relating to operations in Iraq and Kuwait, 1928-1930, and negotiations for the Anglo-Iraq Treaty, 1930; news cuttings and notes relating to political and military affairs in Iraq, and the situation of the Assyrians and Kurds, 1930-1935. Papers created as Air Officer Commanding in Chief, Air Defence of Great Britain, 1933-1935, mainly relating to a Royal Review of the RAF at Mildenhall, Suffolk, and Duxford, Cambridgeshire. Papers relating to post as Air Officer Commanding in Chief, Middle East, notably memoranda, cypher signals, letters and notes, 1931-1936, relating to RAF operations, mainly planning and preparation for the possibility of war between the League of Nations and Italy following the Italian invasion and annexation of Abyssinia; correspondence with ACM Sir Edward Leonard Ellington, Chief of Air Staff, 1935-1936; memoranda, telegrams, correspondence and newscuttings on operational matters relating to the Arab Rebellion against the British Mandate in Palestine, 1936; material collated by Brooke-Popham for lectures on the Middle East, 1930, 1936; correspondence, memoranda and minutes relating to the formation and working of an Executive Committee on Assyrian Settlement, 1943-1947. Papers relating to the creation and implementation of the Empire Air Training Scheme in Canada and South Africa, 1939-1945, including personal correspondence with Arthur William Street, Permanent Under-Secretary of State for Air, 1940. Papers relating to post as Commander in Chief, Far East, notably telegrams and memoranda relating to the requirements of the RAF and Army in the Far East, 1940-1949; personal correspondence with Maj Gen Sir Hastings Lionel Ismay, Secretary to the Committee of Imperial Defence, 1940-1941; semi-official correspondence with Street, 1940-1941; material relating to the replacement of Brooke-Popham as Commander in Chief, Far East, Nov 1941; telegrams relating to reconnaissance sightings of Japanese convoys, the decision not to launch Operation MATADOR, the outbreak of war with Japan, and the sinking of RN battleships HMS PRINCE OF WALES and HMS REPULSE, Dec 1941; papers, correspondence and proofs relating to the publication of various despatches and reports concerning operations in Malaya, 1941-1947. Papers created whilst Inspector General of the Air Training Corps, 1942-1947, 1950-1952, mainly comprising inspection reports and material relating to the post-war organisation of the Air Training Corps. Booklets, memoranda, and reports collated by Brooke-Popham relating to RAF training, policy and operations, [1914]-1946. Material relating to research for and writing of articles, lectures and pamphlets, mainly relating to history, aviation or training, 1923-1952. Printed material, 1890-1953, mainly relating to aviation. Maps and photographs, 1917-[1945], including aerial photographs of the Western Front during World War One, 1917-1918.

Photographs of landscape, towns and local Pathans, North West Frontier, India [1930-1936]; photographs of civilian engineering training, UK, 1934-1936; diary, 1939-1940, narrative of service as Engineer Staff Officer and Field Engineer, Rawalpindi and Staff Officer Royal Engineers 3, Delhi; diary, 1957-1959, narrative of service as Chief Engineer, Far East Land Forces. Photographs of official duties as Chief Engineer, Northern Army Group NATO and British Army of the Rhine, 1959-1962.

Copies of 95 photographs and negatives relating to the Second Boer War, South Africa, 1899-1902, including two photograph albums, 'Snap shots by Capt E A Williams Esq' and 'Snap shots in Natal and Transvaal taken by Capt E A Williams, KDG', and photographs of the Boer President of the Transvaal Stephanus Johannes Paulus (Paul) Kruger and of Col Edward Cecil Bethune. Microfilm copies of two bound order books 'Regimental Orders, 1899-1900' and 'Brigade Orders', and microfilm copies of three scrapbooks of cuttings relating to Bethune's Mounted Infantry in South Africa, 1899-1900, including detailed accounts of specific actions.

Papers relating to Bethell's life and career, 1894-1932, and to his death in action, as First Lt, HMS NESTOR, 13 Destroyer Flotilla, Battle of Jutland, North Sea, 31 May 1916, including Birth Certificate and Certificate of Baptism, 1894; RN record and certificates relating to Bethell's naval career, 1907-1915; one Christmas card, 1913, and three letters to his sister Agatha [Hilda] Bethell, 1915, and eight letters to his mother, Hilda Mary Bethell, Lady Bethell, 1914-1916. Two letters from the Admiralty notifying the family of Lt Bethell's death, 1916; two letters to Hilda Mary Bethell, Lady Bethell, from Cdr Hon (Edward) Barry (Stewart) Bingham, Capt of HMS NESTOR, on Lt Bethell's heroism and on the loss of HMS NESTOR at the Battle of Jutland, 1916; two letters to Agatha [Hilda] Bethell from Lt William Stephen Richard King-Hall, HMS SOUTHAMPTON, on the Battle of Jutland and the sinking of HMS NESTOR, with extract from account of Jutland by Lt Harold Percy Keeley, HMS ATTACK, 1 Destroyer Flotilla, Grand Fleet, Jun 1916; seven letters and telegrams of condolence, notably including HM King George V, Rt Hon Arthur James Balfour, First Lord of the Admiralty, V Adm Sir David Beatty, 1 Battlecruiser Sqn, Grand Fleet, Capt Wilmot Stuart Nicholson, HMS AURORA, and Capt Charles Edward Le Mesurier, HMS CALLIOPE, 1916-1918; three letters on the loss of HMS NESTOR and the death of Lt Bethell from Surgeon Probationer Alexander Joe, Royal Naval Volunteer Reserve, 1918. Edition of Supplement to the London Gazette, containing details of the award of a posthumous Mention in Despatches for Lt Bethell, 4 Oct 1918; nine letters between Adm Hon Sir Alexander Edward Bethell and the Admiralty relating to whether Lt Bethell's heroism was worthy of the award of the VC, Jan-Feb 1919; edition of Parliamentary debates, House of Commons (Hansard) containing questions asked in Parliament by Rt Hon Thomas James Macnamara, Financial Secretary to the Admiralty, relating to Lt Bethell's heroism during the Battle of Jutland, 12 Mar 1919. Photograph of Bethell [1914]; edition of Falklands, Jutland, and the Bight by Cdr Hon (Edward) Barry (Stewart) Bingham, RN (John Murray, London, 1919); official scroll and bronze plaque, sent to the next of kin of servicemen killed in action [1919]; certificate of Mention in Despatches, 1920. Copy of manuscript poem relating to the loss of HMS NESTOR by Robert Malise Bowyer Nichols entitled 'The souls of the righteous', 1931, with related correspondence from John Masefield, Poet Laureate, Cdr Hon (Edward) Barry (Stewart) Bingham, RN and Lt Dudley Rowe, RN, 1931.

Papers relating to Beaufoy Brown's life and RN career, 1925-1979, including scrapbook with newspaper cuttings and fifty five photographs, Aug 1927-Jul 1929, including Atlantic Fleet exercises, 1927, the loss of HM Submarine H47, off St David's Head, Pembrokeshire, following collision with HM Submarine L12, 9 Jul 1929, and photographs of HMS REVENGE, HMS FORRES, HMS RODNEY, HMS HOOD, HMS NELSON and HMS ADVENTURE, 1927-1929. Two Midshipman's journals, 26 Aug 1927-12 Jul 1930, relating to service on HM Ships REVENGE, RODNEY and WALKER, including manuscript sketches and maps, two photographs of the main armament of HMS RODNEY, and photograph of HMS CENTURION, RN radio-controlled target ship, Portland, Dorset, Nov 1928, with twelve loose photographs, 1925-1929, including HMS RODNEY, HMS STURGEON and group of Cadets, Royal Naval College, Dartmouth, Devon, 1925. Typescript report by Beaufoy Brown on the visit to Malta of the Yugoslav training ship JADRAN, 9-11 Jul 1934. Papers and photographs relating to the development and deployment of X craft midget submarines and Chariot manned torpedoes, 1943-[1950], including sixty seven photographs relating to the training of crews for X craft midget submarine operations, 1943-1945, notably six aerial photographs, taken by 544 Sqn, RAF, of Bergen harbour, Norway, before and after Operation GUIDANCE, the sinking by X Craft of German merchant ship BARENFELS, Apr 1944, and Operation HECKLE, the destruction of a floating dock, Laksvaag, Bergen, Norway, Sep 1944; edition of The Illustrated London News, 15 Dec 1945, with article on X Craft operation against Japanese cruiser TAKAO, Singapore, Jul 1945; edition of The Dittybox, the Navy's own magazine, containing article by G V Galwey entitled 'Life in a midget submarine', Feb 1948; typescript text of lecture by Beaufoy Brown on World War Two midget submarine operations [1950]. Photograph album containing 111 photographs relating to Beaufoy Brown's service as Executive Officer, HMS GAMBIA, Mediterranean and East Indies, 1951-1952, including peace keeping patrols, Port Said, Egypt, 1951, and inspection of ship by acting Adm Louis (Francis Albert Victor Nicholas) Mountbatten, 1st Earl Mountbatten of Burma, Commnder-in-Chief Mediterranean, Malta, 1952. Typescript Curriculum Vitae for Beaufoy Brown [1965], and obituary, 1979.

Papers relating to his military service, 1944-1945, principally comprising war diary including maps and photographs, Sep 1944-Jul 1945; copy of report on the liberation of Belsen written for the Director of Military Government by Lt Col R I G Taylor, Officer Commanding, 63 Anti Tank Regt, [1945]; orders relating to the occupation and administration of Belsen, from Brig General Staff of 8 Corps, British Liberation Army, April 1945; report on Belsen by Capt Barker, Royal Army Medical Corps, 63 Anti Tank Regt, Jun 1945; letter to British officers from a group of Czech women prisoners describing their treatment in Belsen, 1945; Barnett's notes for a talk on Belsen, ND; photographs showing inmates and conditions in Belsen, 1945; newspaper cuttings relating to Victory in Europe Day, the liberation of Belsen and the Belsen trial, May-Oct 1945; 'Report by the Supreme Commander to the Combined Chiefs of Staff on the operations in Europe of the Allied Expeditionary Force, June 1944-May 1945', issued by HMSO, 1946.