Papers relating to McNeill's career, 1942-1946, notably on Army-Air collaboration, 1942-1945, including typescript 'Eighth Army training memorandum No 1' by Lt Gen Bernard Law Montgomery, General Officer Commanding 8 Army, Middle East Forces [1942]; typescript memorandum by McNeill 'Recommendations for reorganisation of AASC (Army-Air Support Control)',1942; printed 'Middle East training pamphlet No 3B (Army and RAF). Direct air support', issued by General Headquarters, Middle East Forces and Headquarters, RAF, Middle East, 1943; typescript war diary of Detachment A, Air Support Control, 5 Corps, Italy, Mar-Jun 1944; typescript report produced by Headquarters 21 Army Group, British Liberation Army, North West Europe, entitled 'Notes on airsupport, June-October 1944', Nov 1944; typescript notes by McNeill entitled 'Offensive air support in the Burma campaign, 1944-1945'; two typescript draft chapters for a projected book entitled 'Air support in North Africa, Pantellaria, and Sicily, 1942-1943' and 'Air support in the Italian campaign, 1943-1945' [1946]; typescript account by Roy Smith entitled 'Air support in the desert: an account of the use of air forces in support of the Army from the Gazala battles in 1942 to the end in Tunisia', 1988.

Papers relating to his service in World War Two, dated 1941-1946, 1941-1946, 1951, principally comprising semi-official and personal correspondence, 1941-1946, including letter to his wife describing events leading up to his dismissal from command of 7 Armoured Div, 1942; pamphlet on the Battle of Keren, Mar 1941, produced by Maj Gen Sir Nigel Trapp, HQEritrea District, for visit of Commander-in-Chief, Middle East Land Forces, to Keren battlefield, Eritrea, Mar 1947; Report to the Combined Chiefs of Staff by the Supreme Allied Commander South East Asia, 1943-1945 by AF Louis (Francis Albert Victor Nicholas) Mountbatten, 1st Earl Mountbatten of Burma (London, HMSO, 1951); operational notes and training instructions for 7 and 9 Indian Divs during the Burma campaign, 1943-1945; 'Warfare in undeveloped countries. Part 1: desert warfare', War Office publication written by [Messervy] in 1954; printed histories by Messervy and others describing operations in Burma by 12 Army, 14 Army, 4 Corps, 15 Indian Corps, 23 Indian Corps, and 25 Indian Div; Ministry of Information publications, dated [1945], concerning campaigns in the Middle East and Far East, 1941-1945, the Merchant Navy, 1939-1944, Combined Operations, 1940-1942, Britain's anti-aircraft defences, 1939-1942, and civil defence in the UK, 1940-1941, and the war effort on the Home Front, 1942-1944; Government of India publications,dated [1944-1946], describing the service of various divisions of the Indian Army during World War Two.