Papers relating to Roberts' life and career, 1940-1992, including twenty four detailed letters home to his father, Col William Bradley Roberts, from North Africa and North West Europe, 1940-1944; papers relating to operations in North Africa, 1941-1943, including memoranda, typescript intelligence summaries and typescript and manuscript notes, notably on operations of 22 Guards Bde and 7 Armoured Div, North Africa, Jun 1941; brief notes and correspondence on tank deployment, tactics and specifications, 1943-1944, including typescript copy of letter from Gen Sir Bernard Law Montgomery to Lt Gen Sir Ronald Weeks, Deputy Chief of the Imperial General Staff, on tank specifications, Apr 1944; correspondence, accounts and notes relating to 11 Armoured Div operations in North West Europe, 1944-1945, notably planning notes and reports on Operation GOODWOOD, the 2 Army offensive south east of Caen, France, Jul 1944; typescript and manuscript accounts by personnel of 11 Armoured Div, dated 1982-1993, relating to operations in North West Europe, 1944-1945; correspondence, 1948-1992, including letters from Lt Gen Sir Henry Royds Pownall, Sep 1948, Lt Gen Sir Giffard Le Quesne Martel, 1951, Maj Gen Raymond Briggs, Feb 1951, Maj Gen Sir Percy Cleghorn Stanley Hobart, Sep 1952, and Maj Gen Ronald Frederick King 'David' Belchem, Nov 1978; correspondence between Roberts and the Daily Mail relating to articles written by Roberts on the possibility of a future war with the USSR, 1950-1951; press cuttings relating to service in World War Two, 1939-1945; correspondence between Roberts and The Guardian, Aug-Nov 1969, concerning the liberation of Antwerp, Belgium, 1944; newspaper cuttings, dated 1942-1967, relating to Roberts' service in World War Two, 1939-1945; one group photograph including Roberts [1945]; audiotape of BBC radio broadcast by Roberts, 1944, and after dinner speech, 1990.

Photograph albums relating to his military career, [1914-1942], notably his service in Northern Ireland, 1920, Hong Kong and Shanghai, 1930, North Africa and India, [1930-1940], and Kenya, 1940-1942, with associated papers, [1914-1942], notably a diary of C and D Companies, 1 Bedfordshire and Hertfordshire Regt, Belfast, 28 Jul-30 Jul 1920.

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.

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

Typescript lecture notes on the training of officers, School of Military Engineering, Chatham, Kent [1940]; typescript memorandum by Young entitled 'Notes on Engineer intelligence', 1943; typescript notes by Young on the effects of bombing on port facilities in North Africa, 1943; typescript article by Young entitled 'The development of land mine warfare', 1944; typescript notes by Young entitled 'In Macedonia, 1916-1917', written in 1946, with a manuscript letter from Lt Col Anthony Heritage Farrar-Hockley, Commanding Officer 3 Bn, The Parachute Regt, thanking Young for the use of the notes, 1962; typescript volume entitled 'The Brigade Headquarter's Story. The story of the 130th Brigade HQ (43rd Wessex Division) 1939-1946', edited by S G M Liddle, with four photographs and typescript list of former 130 Bde officers, 1951; correspondence relating to Young's appointment as Hon Col, 121 Army Engineer Regt, Royal Engineers, Territorial Army, 1952-1959; edition of Salonika memories 1915-1919 by G E Willis (Salonika Reunion Association, Newbury Weekly News, Newbury, 1969); edition of Ten Chapters 1942 to 1945 by FM Sir Bernard Law Montgomery (Hutchinson, London, 1946); articles from The Royal Engineers Journal, 1932-1934, including article by Young entitled 'The diary of an RE subaltern with the BEF in 1914'.