The papers cover the period 1914-1965 and include papers relating to service in England, France and with British Army of the Rhine, 1914-1919 in particular 35 Division Artillery Signals; Iraq, including diary, 1920-1921; Nigeria, including field message book, 1924; Quetta, India, including earthquake diary, 1935; newspapers covering death of King George V, 1936; command of Northern Rhodesia Regt, Lusaka, 1937-1940, including scrap albums; command of 26 (East African) Infantry Brigade, East Africa and Abyssinia, 1940- 1941, including operation reports; command of 22 (East African) Infantry Brigade, Madagascar, 1942, including operation reports; command of 28 (East African) Infantry Brigade and 11 (East African) division, Burma and India, 1944-1946 including accounts of operations; General Officer Commanding East Africa, 1946- 1948, including official circulars, speeches and addresses; General Officer Commanding Aldershot Command, 1948-1951, including speeches and lectures; Representative on Military Staff Committtee, United Nations, 1951-1953, including diary; Col Commandant of Northern Rhodesia Regiment, King's African Rifles and Kenya Regiment, including correspondence, 1952-1964, committee papers and publications; papers relating to Army Cadet Force Association including minutes of meetings, 1956-1959; Inter-Parliamentary Union, including account of journey to Warsaw, Poland, 1959; maps, 1914-1943, including Western Front, Iraq and India, Nigeria and Madagascar.

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.