Papers relating to aviation and transport, dated 1910-1928, principally comprising papers relating to Joint War Air Committee (Inter-Departmental Committee on the Air Service) chaired by Edward George Villiers Stanley, 17th Earl of Derby, 1916, Committee on the Administration and Command of the Royal Flying Corps, 1916, and Air Boards chaired by Weetman Dickinson Pearson, 1st Viscount Cowdray, 1917, and George Nathaniel Curzon, 1st Earl Curzon of Kedleston, [1916]; correspondence, 1915-1916, 1920, notably including correspondence with Herbert Henry Asquith, 1916, Curzon, 1916, Derby, 1916, the Imperial Defence Committee, 1916, the Parliamentary Aviation Committee, and George Sydenham Clarke, 1st Baron Sydenham of Combe, 1916; printed books, pamphlets, memoranda, notes and texts by Douglas-Scott-Montagu and others, 1910-1920, mainly relating to aviation technology, anti-aircraft defence and the organisation of the air services; memoranda, official reports, notes and texts relating to his work as Adviser on Mechanical Transport Services to the Government of India, 1915-1919; manuscript account of service of No 1 Armoured Motor Unit, North West Frontier, India, 1915-1916, by Capt A J Clifton, 68 Durham Light Infantry, 1915-1916, dated 1917, including photographs and preface by Montagu. Other papers relating to his life and career, 1914-1926, dated 1914-[1926], 1948, principally comprising letters relating to his service with 7 Hampshire Regt in Egypt, 1914, and India, 1915; photographs and photographic negatives, 1915-1922, mainly relating to his service in India, 1915-1919. Typescript draft of A strange war. Burma, India and Afghanistan, 1914-1919 (Sutton, Gloucester, 1988), an account of 2/5 Bn, Somerset Light Infantry and 2 Mechanical Transport Company by Chris P Mills, based on the recollections of Col B G L Rendall, the diary of Edward William Ewens and research into the Montagu papers, dated 1987.

Typescript memoir entitled '37 years in the IMS [Indian Medical Service]', [1938], notably concerning the treatment of tuberculosis in India, 1910-1937, service in Waziristan, North West Frontier, India, 1901-1902, prison service, Jhansi, 1906-1907, and service in World War One with the Mesopotamia Expeditionary Force, 1916-1918, 304 pps.

Photocopies of memoir covering military service, 1860-1918; published account of Tochi Valley expedition, Afghanistan, 1897-1898; complaint relating to conditions in trenches, Western Front, World War One, 1915.