Papers relating to Alexander's service as Chief of Defence Staff, Ghana, 1960-1961, including correspondence from AVM Henry Algernon Vickers Hogan, Headquarters Flying Training Command, RAF, on the training of Ghanaian pilots, Aug 1960; correspondence, reports and notes on the creation of an African High Command, following a decision taken in Casablanca, Morocco to form a Charter of African States, signed by Algeria, Ghana, Guinea, Mali, Morocco, Tunisia and the United Arab Republic, 1960, including typescript 'Brief for President on situation in the Congo and the role of an African High Command'. Dec 1960; correspondence with Air Cdre John Nicholas Haworth Whitworth, Air Chief of Staff, Ghana Air Force, Jan-Aug 1961; typescript 'Russian report on Ghana armed services', 1961; typescript memoranda by Alexander and by Air Cdre Whitworth, on the Soviet report on the Ghana armed forces, May-Jun 1961; typescript memorandum by Alexander to Dr Kwame Nkrumah, President of the Republic of Ghana, expressing concern on the plan to send Ghanaian cadets to the USSR for military training, Sep 1961. Papers relating to the Ghanaian Army's involvement in UN peacekeeping duties in the Congo, 1960-1961, including typescript 'Notes on non-military briefing for senior officers of the UN force in the Congo' by Ralph Johnson Bunche, Special Representative of the Secretary General of the UN, Jul 1960; typescript press releases on the crisis in the Congo, Jul 1960, typescript correspondence with Brig Joseph E Michel, commanding UN Ghanaian Bde, Congo, Aug 1960-Feb 1961; typescript 'Report on disturbances at Tshikapa on 18/19 Jan 1961' by Brig Joseph E Michel, commanding Ghana Bde, Congo, relating to the mutiny of troops of 3 Bn, The Ghana Regt; typescript 'Report of the evacuation of the Hon Mr Welbeck from the Congo' (Hon Nathanial Welbeck, Ghanaian diplomat), Nov 1960; typescript 'Report on visit to the Congo', by Alexander, Feb 1961. Papers relating to Alexander's dismissal as Chief of Defence Staff, Ghana, and to the removal of British personnel from the Ghana armed forces, 1961, including typescript memorandum by Alexander 'Withdrawal of British officers and other ranks from active units of the Ghana Army', Sep 1961; typescript report by Alexander to the Ministry of Defence 'Background to the sudden dismissal of British officers from the Ghana armed forces' [1961]. Papers relating to Alexander's role as a British Observer, International Observer Team on Genocide, Nigeria, 1968-1970, including typescript report by Alexander 'The war in Nigeria', 1968; printed map of Nigeria, with annotations showing territories controlled by Federal and Biafran forces, 1968; typescript 'Report and findings of the representatives of Canada, Poland, Sweden and the United Kingdom for the period 1 October 1969 to 31 January 1970', Feb 1970. Edition of African tightrope. My two years as Nkrumah's Chief of Staff (Pall Mall Press, London, 1965).

Typescript draft of 'The memoirs of a professional soldier in peace and war', an unpublished account of Clarke's career in the army, including service in Gallipoli and Palestine during World War One, 1968; various papers and pamphlets collated by Clarke, mainly relating to the training and performance of the Royal West African Frontier Force, 1923-[1960]; articles written by Clarke and published in British and African journals and periodicals, 1926-1959; printer's transparencies of maps used by Clarke in Part Two of the History of the Royal West African Frontier Force (Gale and Polden, Aldershot, 1964).

The papers cover the period 1914-1965 and include papers relating to service in England, France and with British Army of the Rhine, 1914-1919 in particular 35 Division Artillery Signals; Iraq, including diary, 1920-1921; Nigeria, including field message book, 1924; Quetta, India, including earthquake diary, 1935; newspapers covering death of King George V, 1936; command of Northern Rhodesia Regt, Lusaka, 1937-1940, including scrap albums; command of 26 (East African) Infantry Brigade, East Africa and Abyssinia, 1940- 1941, including operation reports; command of 22 (East African) Infantry Brigade, Madagascar, 1942, including operation reports; command of 28 (East African) Infantry Brigade and 11 (East African) division, Burma and India, 1944-1946 including accounts of operations; General Officer Commanding East Africa, 1946- 1948, including official circulars, speeches and addresses; General Officer Commanding Aldershot Command, 1948-1951, including speeches and lectures; Representative on Military Staff Committtee, United Nations, 1951-1953, including diary; Col Commandant of Northern Rhodesia Regiment, King's African Rifles and Kenya Regiment, including correspondence, 1952-1964, committee papers and publications; papers relating to Army Cadet Force Association including minutes of meetings, 1956-1959; Inter-Parliamentary Union, including account of journey to Warsaw, Poland, 1959; maps, 1914-1943, including Western Front, Iraq and India, Nigeria and Madagascar.