Papers relating to early career, including material on early aviation, 1911-1913, and texts of lectures given at the RAF Staff College, Andover, 1922-1926. Material relating to post as Air Officer Commanding, British Forces in Iraq, 1928-1935, including correspondence, memoranda and telegrams relating to operations in Iraq and Kuwait, 1928-1930, and negotiations for the Anglo-Iraq Treaty, 1930; news cuttings and notes relating to political and military affairs in Iraq, and the situation of the Assyrians and Kurds, 1930-1935. Papers created as Air Officer Commanding in Chief, Air Defence of Great Britain, 1933-1935, mainly relating to a Royal Review of the RAF at Mildenhall, Suffolk, and Duxford, Cambridgeshire. Papers relating to post as Air Officer Commanding in Chief, Middle East, notably memoranda, cypher signals, letters and notes, 1931-1936, relating to RAF operations, mainly planning and preparation for the possibility of war between the League of Nations and Italy following the Italian invasion and annexation of Abyssinia; correspondence with ACM Sir Edward Leonard Ellington, Chief of Air Staff, 1935-1936; memoranda, telegrams, correspondence and newscuttings on operational matters relating to the Arab Rebellion against the British Mandate in Palestine, 1936; material collated by Brooke-Popham for lectures on the Middle East, 1930, 1936; correspondence, memoranda and minutes relating to the formation and working of an Executive Committee on Assyrian Settlement, 1943-1947. Papers relating to the creation and implementation of the Empire Air Training Scheme in Canada and South Africa, 1939-1945, including personal correspondence with Arthur William Street, Permanent Under-Secretary of State for Air, 1940. Papers relating to post as Commander in Chief, Far East, notably telegrams and memoranda relating to the requirements of the RAF and Army in the Far East, 1940-1949; personal correspondence with Maj Gen Sir Hastings Lionel Ismay, Secretary to the Committee of Imperial Defence, 1940-1941; semi-official correspondence with Street, 1940-1941; material relating to the replacement of Brooke-Popham as Commander in Chief, Far East, Nov 1941; telegrams relating to reconnaissance sightings of Japanese convoys, the decision not to launch Operation MATADOR, the outbreak of war with Japan, and the sinking of RN battleships HMS PRINCE OF WALES and HMS REPULSE, Dec 1941; papers, correspondence and proofs relating to the publication of various despatches and reports concerning operations in Malaya, 1941-1947. Papers created whilst Inspector General of the Air Training Corps, 1942-1947, 1950-1952, mainly comprising inspection reports and material relating to the post-war organisation of the Air Training Corps. Booklets, memoranda, and reports collated by Brooke-Popham relating to RAF training, policy and operations, [1914]-1946. Material relating to research for and writing of articles, lectures and pamphlets, mainly relating to history, aviation or training, 1923-1952. Printed material, 1890-1953, mainly relating to aviation. Maps and photographs, 1917-[1945], including aerial photographs of the Western Front during World War One, 1917-1918.

Papers and photographs relating to Caunter's career, 1908-[1960], including one photograph album, containing 90 photographs, newspaper cuttings and invitations, 1908-1933, notably photographs of Crefeld POW camp, Germany, 1916, Caunter's return to UK following his escape from Schwarmstedt POW camp, Germany, 1917, group photographs of officers, Staff College, Camberley, Surrey, 1922-1923 and Senior Officers Course, Hythe, Kent, 1927, with thirty five loose photographs, 1909-1941, including Salonika, 1918, Iraq, 1920-1921, Egypt, 1936, and Western Desert, Libya, 1941. Papers relating to the First Libyan Campaign, Western Desert, 1940-1941, and Caunter's command of 4 Armoured Bde in the capture of Fort Capuzzo, Battle of Beda Fomm, Libya, Feb 1941, including typescript memorandum by Caunter entitled 'Notes on the disposal of prisoners captured by AFV (Armoured Fighting Vehicle) units', 1 Oct 1940; two typescript 7 Armoured Div intelligence summaries, Dec 1940; typescript memorandum by Caunter entitled 'Some lessons from the campaign', [1941]; typescript account entitled 'The story of the 4th Armoured Brigade in the First Libyan campaign', Western Desert, 1940-1941; two letters from Capt Basil Henry Liddell Hart, dated Jan 1947 and Dec 1951, relating to Caunter's deployment of armoured forces in the Battle of Beda Fomm, Western Desert, Feb 1941. Memoranda and reports relating to Caunter's service as Brig General Staff and Deputy Director of Staff Duties, Armoured Troops, General Headquarters, India, 1941-1943, including typescript memorandum by Caunter, 'Defence of the North West Frontier of India and appreciation' [1942]; typescript report by Lt Col Rothwell H Brown, US Army, 'Report of conditions noted in armoured units and ordnance establishments by the US Army Tank Training Detachment', 10 Nov 1942; edition of Tanks and tank folk by Eric Kennington (Country Life, London, 1943).

Two pilot's flying log books, 1933-1937 and 1937-1960. Typescript 'Report on GAF (German Air Force) night fighting from the interrogation of prisoners' by Wing Cdr W K Davison, Officer Commanding 88 Sqn, RAF [1944]; typescript report by James Lansdale Hodson entitled 'Night fighters' [1944]; typescript memorandum by Slade, 'Notes for new crews' [1944]; typescript 'Report on GAF night fighter system. A post mortem' [1945]. Photograph album with uncaptioned photographs of Slade's RAF service in Egypt and Iraq, 1933-1937. Fifteen photographic negatives and 185 photographs, 1933-1960, including aerial photographs of terrain, Iraq, 1934-1937, group photographs, 1942-1945, and Fairey Aviation Limited aircraft in flight [1960], notably the Gannet and the Rotodyne.