Papers, 1908-1974, including Wynne's letters home to his father from Germany, 1908-1911, including detailed descriptions of illegal duelling by students in Hannover, Germany and calling card of General Otto von Emmich, Commander, 10 Army Corps, Hannover, Germany, 1909-1915. Bound typescript account by Wynne, 29 Jul-4 Sep 1914, on his experiences in the BEF's (British Expeditionary Force's) retreat from Mons, Belgium, the Battle of Le Cateau, France, and capture by German forces during the Battle of Le Cateau, France, 26 Aug 1914, written as a POW in Germany, Sep-Oct 1914. Correspondence, press cutting, menus and Christmas cards relating to time as POW, Germany and Netherlands, 1914-1918, including letters written to parents from Portobello Barracks, Dublin, immediately before embarkation for France, Aug 1914; cutting from The Morning Post , 3 Sept 1914, listing Wynne as killed; letter home from POW camp, Magdeburg, Germany, 30 Dec 1914, referring to incorrect report of his death; menus, playing cards and Christmas cards with watercolours by Wynne and signatures of fellow POW's. Correspondence and papers relating to Wynne's work for the Historical Section, Cabinet Office, and to his publications, 1928-1958, including two letters from Maj Gen Sir Ernest (Dunlop) Swinton relating to German defence systems, 30 Sep 1939, and to Wynne's book, If Germany attacks. The battle in depth in the west (Faber and Faber, London, 1940), 2 Feb 1940; manuscript diary and typescript report by Wynne on an official visit to North Africa, 12 Apr-23 May 1943; letters to Wynne from Lt Gen Sir Kenneth Arthur Noel Anderson, General Officer Commanding 1 Army, North Africa, rebutting allegations reported to Wynne by troops of 8 Army of Anderson's poor handling of 1 Army in operations in North Africa, May 1943; three letters from Capt Basil Henry Liddell Hart, dated Jan-Jul 1958, relating to Wynne's article on the Schlieffen plan and The Schlieffen plan. Critique of a myth by Professor Gerhard Ritter (Oswald Wolff, London, 1958). Correspondence, 1939-1974, relating to Wynne's publications, including his book If Germany attacks. The battle in depth in the west (Faber and Faber, London, 1940). Also photograph of Wynne's father, General Sir Arthur Singleton Wynne, c.1914.

Papers relating to early career including memoirs covering 1903-1935 and Army Record of Service, 1923-1952; campaign in Norway, World War Two, including War Diary, May 1940, operational orders and diary covering preparation of 2 Independent Company for service in Norway; papers including lecture notes and schedules for courses at Special Training Centre, Inverailort Castle, Loch Ailort, 1940-1941; Madagascar, 1942-1943, including photograph album on service with 2 Company Royal Welch Fusiliers and order of battle for Battle of Majunga, Sep 1942; Burma, 1943-1945, including memoir and photograph album, 29 Brigade, 36 Division, official reports and printed histories including the Arakan campaign; Palestine, 1947-1948 including Operation BROADSIDE, 1946, reports and correspondence; transfer of 6 Airborne Division to British Army of the Rhine, 1947-1948; Malaya, including operational papers, photographs and texts of speeches; Suez Crisis, 1956, including reports, maps, photographs and correspondence; Deputy Supreme Allied Commander, 1960-1964 including photographs; and miscellaneous papers relating to postwar career, including memorial address, 1987.

Papers, 1814-2015, relating to Hamilton's life, military career and activities. The collection specifically includes correspondence, 1852-1899; diaries and notebooks, 1870-1899; printed correspondence and speeches of FM Frederick Sleigh Roberts, 1st Earl Roberts of Kandahar, Waterford and Pretoria, 1878-1893; diaries kept during the siege of Ladysmith, South Africa, 1899-1900; personal and official correspondence during the Second Boer War, 1899-1902, including Hamilton's letters to FM Frederick Sleigh Roberts, 1st Earl Roberts of Kandahar, Waterford and Pretoria, 1901-1902, and operational correspondence of 10 Div and Hamilton's Force, 1900; Hamilton's diaries of the Russo-Japanese War, 1904-1905 and related correspondence, 1902-1905; publications of the Royal Commissions on the war in South Africa and on the Militia and Volunteers, 1903-1904; correspondence as General Officer Commanding Southern Command, 1905-1909, and related official papers; correspondence as General Officer Commanding Mediterranean Command and Inspector General of Overseas Forces, 1910-1914, including papers relating to compulsory and voluntary military service, official reports on overseas forces, and correspondence relating to Hamilton's tours of the West Indies, South Africa, the Far East, Canada, Australia and New Zealand; correspondence as Commander-in-Chief Central Force, Home Defence, 1914-1915; papers as General Officer Commanding Mediterranean Expeditionary Force on Gallipoli, 1915, including correspondence with FM Horatio Herbert Kitchener, 1st Earl Kitchener of Khartoum and Broome, and the War Office, Rt Hon Winston Leonard Spencer Churchill MP, Lt Gen Sir John Grenfell Maxwell and Lt Gen Sir William Riddell Birdwood; papers relating to Ellis Ashmead Bartlett and Keith Arthur Murdoch, war correspondents on Gallipoli; papers relating to operations at Suvla Bay and Sari Bair, Aug-Sep 1915, and to the efficiency of commanding officers; papers relating to Hamilton's despatches from Gallipoli, and to recommendations for decorations; official despatches, 1914-1919; force orders, intelligence bulletins and other papers of General Headquarters, Mediterranean Expeditionary Force; papers relating to Hamilton's Gallipoli diary; maps and official photographs of the Gallipoli Campaign; depositions of witnesses given to the Dardanelles Commission, with related correspondence, 1916-1919; correspondence with the War Office, 1917-1938; correspondence as Colonel of the Gordon Highlanders, 1912-1949; correspondence relating to ex-servicemen, the British Legion, and to war memorials, 1916-1949; correspondence and papers as Lord Rector of Edinburgh University, 1932-1936; correspondence with major military, political and literary acquaintances, including Rt Hon Winston Leonard Spencer Churchill MP, Rt Hon Richard Burdon Haldane, 1st Viscount Haldane of Cloan, Capt Sir Basil Henry Liddell Hart, John Masefield, FM Sir William Robert Robertson, and senior officers associated with the Gallipoli Campaign, 1916-1949; correspondence relating to the Anglo-German Association and to Anglo-German relations, 1928-1947; correspondence with members of the public and relatives, 1908-1948; business and financial correspondence, 1913-1947; correspondence relating to Hamilton's estate and his literary executors, 1948-1969; papers relating to Hamilton's publications, 1872-1948; speeches, articles and letters to the press, 1918-1947; scrapbooks and press cuttings, 1883-1971; photographs, 1855-1947; publications and other printed material, 1814-1966; diaries, correspondence and publications of Hamilton's wife, Jean Miller Hamilton, Lady Hamilton, 1869-1940; correspondence of Eleanor Charlotte Sellar, 1896-1934, including correspondence with Hamilton, FM Sir George Stuart White and FM Sir Neville Bowles Chamberlain.

Papers relating to the Anglo-German Yola-Cross River Boundary Commission, Nigeria and Cameroon, 1907-1909, comprising bound typescript account of the work of the Commission between Yola and Kwosa, Aug 1908, with unsigned geological report on the Nigerian-Cameroon Boundary, Yola to Cross River, 1907-1909, written in [1909]; photographs, 1907-1909, bound with 'Two years on an Anglo-German boundary commission in West Africa', typescript by Downes, [1909] and 'Nigeria: delimitation of boundary between Yola and the Cross River, 1907-9', Command paper 5368, printed by HMSO in 1909. With the Nigerians in German East Africa (Methuen and Co, London, 1919), special edition bound with typescript copies of press reviews, 1919. Photographs relating to his service with 2 Royal Sussex Regt, Crete, 1906, bound with an account of his service, written in 1915. Photographs of Sinai, 1909-1911, mainly landscapes and people.