Papers relating to his military career, 1939-1962, principally his service in Burma, 1939-1941, UK, 1941-1943, North Africa, 1943, Italy, 1943-1944, and Korea, 1955-1956, notably including battalion orders for 2 Bn, Sherwood Foresters, 1945; German propaganda leaflets for US and Allied troops, [1944]. 'An ancient Yorkshire family', a history of the Slingsby family, written by Slingsby in 1989.

Memoir of his service with the Royal Scots Greys in the Middle East, 1942-1943, Italy, 1943-1944, and North West Europe, 1944-1945, written from his own experiences and using regimental war diaries, 1947.

Papers relating to his service in the Indian Army, dated [1941], 1942, [1944], 1947, 1962-1964, 1970, 1973, 1984, principally comprising photographs of convoys at Sarwekai on the route between Mangai and Wana, South Wazaristan, India, [1941]; operation instructions for 50 Parachute Bde exercise in Tughlakabad area, India, Mar 1942; 'Some notes on Gurkhas', typescript text by Stevenson-Hamilton, 1943; typescript account of the service of 4 Prince of Wales's Own Gurkha Rifles, India, 1943-1944, written by Stevenson-Hamilton in [1944]; typescript account of the service of 2 Bn, 4 Prince of Wales' Own Gurkha Rifles, Italy, 1944, written by [Stevenson-Hamilton] in [1944]; unsigned official notes on a tour of Arakan by 98 Indian Infantry Bde, Burma, 1944; 71 Indian Infantry Bde instructions for operations in Maungdaw, Burma, Apr 1944; typescript text on Gurkha operations in Wazaristan and the Punjab, India, 1947, and on the proposed transfer of Gurkha regiments to the British Army, 1947; notebook containing notes on misdemeanours and crimes committed by soldiers at Garlochhead Training Camp, Helensburgh, 1962-1964.

Microfilm collection containing copies of meeting minutes of the major conferences of the Combined Chiefs of Staff, 1941-1945. Meeting minutes include those for the conference held at Washington, DC, codenamed ARCADIA, at which Anglo-American planners first formed a combined strategy for the prosecution of the war, 22 Dec 1941-14 Jan 1942; the conference at Casablanca, Morocco, codenamed SYMBOL, during which the Anglo-American Combined Chiefs of Staff (CCS) first discussed the policies of German unconditional surrender, the Combined Bomber Offensive from Great Britain against Germany and the establishment of the French National Committee for Liberation, 14-24 Jan 1943; the Allied conference held at Washington, DC, codenamed TRIDENT, at which President Franklin Delano Roosevelt, Prime Minister Rt Hon Sir Winston Leonard Spencer Churchill, and the Combined Chiefs of Staff (CCS)discussed the decision to delay the invasion of France until May 1944, the Italian surrender, and the Battle of the Atlantic, 11-25 May 1943; the Allied conference at Quebec City, Canada, codenamed QUADRANT, at which the Allies endorsed a plan for the invasion of the Normandy coast in France, formed a new theatre of war, South-East Asia Command, with Acting Adm Lord Louis (Francis Albert Victor Nicholas) Mountbatten as Supreme Allied Commander, and regulated the procedures for co-operation between Great Britain and the US regarding the development and production of the atomic bomb, 12-24 Aug 1943; the Allied conferences at Cairo, Egypt, codenamed SEXTANT, at which the Allies discussed combined operations in South-East Asia with Generalissimo Chiang Kai-shek's Chinese forces, 22-26 Nov and 2-7 Dec 1943; the Allied conference at Teheran, Iran, codenamed EUREKA, during which the Allies first co-ordinated future strategy with Soviet Prime Minister Joseph Vissarionovich Stalin, including plans to coincide military operations against Germany in France and the Soviet Union in May 1944, 28-30 Nov 1943; the conference at Quebec City, Canada, codenamed OCTAGON, at which the Allies discussed the post-war division of Germany and a plan for its de-industrialisation, 12-16 Sep 1944; the conferences at Malta and Yalta, Soviet Union, codenamed ARGONAUT, at which the Allies discussed the division of post-war Germany, the occupation of Germany and Austria, Soviet involvement in the war against Japan, and the future government and frontiers of Poland, 30 Jan-9 Feb 1945; the conference at Potsdam, Germany, codenamed TERMINAL, during which surrender terms for Japan were discussed, the boundaries and peace terms for Europe were determined and Poland's government and frontiers were debated, 16 Jul-2 Aug 1945. Conference minutes include references to Allied production and assignment of war materials; British and US merchant vessel losses; US policy concerning assignments of Lend-Lease military aircraft, naval vessels and munitions to Great Britain; Allied petroleum supplies; propaganda and unconventional warfare; war crimes and prisoners of war; operational reports concerning the planning and conduct of Allied offensive operations in Europe, including the invasion of North Africa, codenamed Operation TORCH, Nov 1942; the invasion of Sicily, Italy, codenamed Operation HUSKY, Jul 1943; the US preparation for the invasion of Europe, codenamed Operation BOLERO; and the Allied invasion of Europe, codenamed Operation OVERLORD, Jun 1944; operational reports concerning the Japanese war economy; Japanese Imperial Army logistical capabilities; locations and strengths of Japanese forces in the Pacific; British participation in long range bombing of Japan; Allied operational efforts in Burma, India, Malaya, and the Philippines; Soviet claims on the Sakhalin and Kuril islands; the co-ordination of Allied strategic plans for the defeat and occupation of Japan, 1943-1944; Soviet military action to facilitate Operation OVERLORD; liaison between Allied theatre commanders and the Soviet Army; Soviet capabilities with reference to the Far East; US Lend-Lease requirements for the Soviet Union; and estimates of Soviet post-war capabilities and intentions, 1943-1945.

This microfilm collection contains copied official documents relating to US naval operations in Europe and US naval liaison duties in Britain, 1941-1946. Many of the microfilmed documents are official reports sent to the Historical Section, US Navy, in 1946, for the purposes of compiling an official history. The collection includes material relating to the US naval administration, 1940-1946; the US Navy Special Observer missions in London, 1940-1946; the decision to post Adm Harold Raynsford Stark as Commander, [US] Naval Forces in Europe (COMNAVEU); COMNAVEU organisation and personnel, 1940- 1946; operational reports concerning [US] Naval Forces in Europe (COMNAVEU) and associated commands of COMNAVEU, including US 12 Fleet, 1941-1946; US naval intelligence and naval attaché duties; units under the command of COMNAVEU, including task forces and amphibious forces; supply and logistical activities, 1940- 1946; the history of Lend-Lease and Reciprocal Aid in Britain; the history of US naval bases in Britain; logistical planning for US Naval Forces in Europe for cross- channel operations; COMNAVEU's role in the planning and execution of Operation OVERLORD, the Allied invasion of France, 6 Jun 1944, and Operation NEPTUNE, the air and land assault on France, Jun 1944, including the naval bombardment of Axis forces and the use of US Navy amphibious forces to assault the beaches at Normandy, France assaults; a history of US Naval Task Forces in France, Germany, the Azores, the Mediterranean, and Italy, 1945-1946; relations with US Navy Pacific Command, 1941-1946.

Copies of pocket diaries covering his service in Italy, Jun 1944-Apr 1945. Two photographs of Wheeler, [1939-1945].

World War Two ordnance survey maps of the United Kingdom and Europe, mainly 1 inch, prepared by the Geographical Section, General Staff, and the War Office, for use by the Royal Electrical and Mechanical Engineers (REME), including 1:40,000 map of Antwerp, Belgium; 1:100,000 map of Brussels, Belgium; 1:5,000,000 map of South Africa; 1:250,000 map of Italy; and 1:50,000 map of Northeast France. Also included are German survey maps of North Africa and Northern Greece, and 1:300,000 map of the Netherlands with manuscript outline of German Army occupation districts, 1940-1943