Papers relating to his role in the development and production of armoured fighting vehicles, dated 1914-1959, 1964, 1994, principally comprising correspondence, memoranda and minutes relating to the Landships Committee, 1915-1916, and the Tank Supply Committee, Tank Supply Department (later Mechanical Warfare Supply Department) and Mechanical Warfare (Overseas and Allies) Department, 1916-1918; progress reports and memoranda on design and construction of landships, 1915; plans, drawings and blueprints for landships and tanks, 1915-1916; 'Notes on the employment of tanks' by Col Ernest Dunlop Swinton, printed at the Foreign Office, 1916; 'Mechanical warfare, a summary of British tank development, 1914-1918', typescript text by Stern, [1925]; papers relating to the establishment of the Allied Tank Factory at Neuvy Pailloux, Chateauroux, France, dated 1917-1918; notes and reports by Lt J Rackham and George Watson relating to the use of tanks on the Western Front, 1917; 'The tactical employment of tanks in 1918', unofficial report by Col John Frederick Charles Fuller, 1917; correspondence and memoranda relating to Ministry of Supply Special Vehicle Development Committee and the Tank Board, 1939-1943, and the design and development of TOG heavy tanks, 1939-1944 ['TOG' - The Old Gang, informal name for Special Vehicle Development Committee members, some of whom had worked on tank development during World War One], including correspondence with Rt Hon Edward Leslie Burgin, Minister of Supply, 1939-1940, Rt Hon Herbert Stanley Morrison, Minister of Supply, 1940, Rt Hon Sir Andrew Rae Duncan, Minister of Supply, 1940-1941 and 1942, Rt Hon William Maxwell Aitken Beaverbrook, 1st Baron Beaverbrook, Minister of Supply, 1941-1942, Sir James Lithgow, Chairman of the Tank Board, 1941, and Rt Hon Winston (Leonard Spencer) Churchill 1940-1942, Prime Minister, First Lord of the Treasury and Minister of Defence, Sir William Tritton of Tritton, Foster and Co, and Cdr R H Stokes-Rees, 1943-1944; official reports by Lt Col Gordon Hall on British and Italian use of tanks in the Middle East, 1940-1941, dated 1941; specifications and technical reports relating to tanks, 1939-1944; minutes of Special Vehicle Development Committee, 1939-1942; papers relating to investigation of Stern's position in the Ministry of Supply, 1942, dated 1939-1942, including transcriptions of interviews with Stern, 1942; correspondence and memoranda relating to Stern's evidence before the Sub-Committee on National Production and Supply of the House of Commons Select Committee on National Expenditure; publications and printed material relating to tanks, 1915-1919, 1939-1946, 1959; photographs, 1915-1918, 1939-1945, principally comprising British, French and Canadian photographs of tanks, 1915-1918; photographs of TOG tanks, 1939-1942; films concerning the development of the tank, 1918, 1941-1942, 1957. Other papers relating to his life and career, notably including photographs relating to his service with the Royal Naval Air Service, 1914-1915; copies of personal correspondence, 1918-1919.