Manuscript diaries, 1939-1946, notably covering his command of 2 Corps, BEF, France and Belgium, 1939-1940, his service as Commander-in-Chief, Home Forces, 1940-1941, and as Chief of the Imperial General Staff, 1941-1946, with detailed accounts of meetings and conversations, and comments on personalities. Detailed unpublished memoirs, 1883-1946, written in [1946-1960]. Personal files, 1940-1946, principally comprising copies of official and semi-official correspondence with FM Sir Bernard Law Montgomery, 1942-1945, relating to his commands of 8 Army, Middle East, 1942-1943, and 21 Army Group, North West Europe, 1944-1945; with FM Archibald Percival Wavell, 1st Viscount of Cyrenaica and of Winchester, 1940-1945, relating to his commands in the Middle East, 1940-1941, and India, 1941-1945; with FM Sir (Henry) Maitland Wilson, 1943-1945, relating to his commands in the Middle East, 1943-1944, and as head of British Joint Staff Mission, Washington, 1944-1945; with FM Hon Sir Harold Rupert Leofric George Alexander, 1942-1945, relating to his commands in the Middle East, 1942-1943, and Italy, 1943-1944, and the Mediterranean, 1944-1945; with Lt Gen Sir Kenneth Arthur Noel Anderson, 1942-1945, relating to his commands in North Africa, 1942-1944, and East Africa, 1945; with Adm Lord Louis (Francis Arthur Victor Nicholas) Mountbatten, Supreme Allied Commander, South East Asia, 1943-1945; with FM Sir John Greer Dill, head of British Joint Staff Mission, Washington, 1941-1944; with Lt Gen Frederick Arthur Montagu Browning, Chief of Staff, South East Asia Command, 1944-1945; with Lt Gen Herbert Lumsden, South West Pacific Area, 1944; with Lt Gen Sir Frank Noel Mason-Macfarlane, Governor and Commander-in-Chief, Gibraltar, 1942; and with Gen Wladyslaw Sikorski, Polish Forces, 1941-1943. Papers relating to his role as Chief of the Imperial General Staff, 1941-1946, dated 1940-1951, notably including conference papers for Combined Chiefs of Staff meetings, 1943-1945; semi-official correspondence with Lt Gen Sir Claude John Eyre Auchinleck, 1940-1945, relating to Auchinleck's commands in Norway, India and the Middle East, 1940-1945. Other papers relating to his life and career, 1897-1963, dated 1897-1966, 1992-1993, including letters to his mother, 1906-1920, notably covering his service in India, 1906-1914 and France and Belgium, 1914-1918; texts of his lectures on artillery given at Staff College, Camberley, 1923-[1926]; papers relating to his post-war activities, notably his role as Chancellor of Queen's University, Belfast, 1949-1963, dated 1949-1968; papers relating to ornithology, 1950-1963; published and unpublished articles collected by Alanbrooke and his wife, 1929-1967; texts of his speeches and broadcasts, 1944-1962; photographs, [1902-1963], 1978, 1992, mainly official photographs of Alanbrooke as Chief of Imperial General Staff, 1941-1942. Papers collected by Mrs M C Long in preparation for the writing of Alanbrooke's biography, dated 1954-1958, notably including texts of interviews with friends and colleagues, 1954-1958. Correspondence relating to Alanbrooke's papers and Sir Arthur Wynne Morgan Bryant's books Turn of the tide (Collins, London, 1957) and Triumph in the West (Collins, London, 1959) (both based on Alanbrooke's diaries), dated 1951-1968. Correspondence of FM (Richard) Michael (Power) Carver, Baron Carver, relating to erection of Alanbrooke statue in Whitehall in 1993, dated 1991-1993

Papers relating to the Japanese and British capture of the German possession of Tsingtao, North China, during World War One, and a subsequent visit to Japan, 1914; papers created during command of 39 Div, 1915-1916; papers relating to post as Chief of British Military Mission to Portugal, including personal diaries, and correspondence relating to discussions held by Barnardiston on Belgian neutrality in 1906, 1916-1919.

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.

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.