Papers relating to his life and career, 1915-1991, dated 1963, 1969 and [1991], principally comprising 'Nine lives, a soldier's story', a typescript memoir covering the period 1915-1991, including his service in North Africa and the Western Desert, 1939-1942 and 1943, the Middle East, 1942-1943 and 1954-1956, Normandy, 1944, and France, Belgium and Germany, 1945-1947, and hiswork as Director General of Fighting Vehicles, 1964-1966, and General Officer Commanding, Malta and Libya, 1967-1968, written in [1991].

Papers and maps chiefly concerning the Fife and Forfar Yeomanry, [1918]-1959, including typescript copy of war diary, 1 Armoured Reconnaissance Bde, British Expeditionary Force (BEF), Belgium and France, 30 Mar-30 May 1940, with typescript recommendations for awards, 1940; typescript account, dated Jun 1942, of dispositions and operations of B Sqn, 1 Fife and Forfar Yeomanry, Belgium and France, 14 May-1 Jun 1940; typescript list entitled '1 Fife and Forfar Yeomanry, nominal roll of casualties sustained in France, 1940'; article by Maj Otho Munton Bullivant, Adjutant, 1 Fife and Forfar Yeomanry, entitled 'With the BEF [British Expeditionary Force] in Flanders', from The Tank [1941]; typescript 'Precis of activities of 1st Fife and Forfar Yeomanry', British Liberation Army, North West Europe, Oct 1944-Feb 1945, and 'Details of activities of 1st Fife and Forfar Yeomanry', 1-31 Mar 1945; correspondence with various officers concerning Regimental affairs, 1943-1945, including Col James Younger, 2nd Viscount Younger of Leckie, Honorary Col, Fife and Forfar Yeomanry, 1945; correspondence, dated 1944-1945, relating to the return of the Regimental band instruments, abandoned by the Fife and Forfar Yeomanry during the retreat to Dunkirk, 1940, and kept by the local townspeople, France, 1940-1944; official correspondence concerning Prain's Army pension and war disablement compensation, 1946-1956; correspondence, dated 1947-1959, relating to the writing and publication of The Fife and Forfar Yeomanry, 1919-1956 by Robert James Batchen Sellar (William Blackwood, Edinburgh and London, 1960). Twenty five photographs relating to the Fife and Forfar Yeomanry, 1923-1945, including group photograph of Armoured Car Company, Fife and Forfar Yeomanry, Annesmuir camp, Scotland, Jul 1923; five photographs of Fife and Forfar Yeomanry Vickers Light Tanks Mark VIB and Universal carriers, France, 1940; official photograph of Infantry Tank Mark IV Churchill Crocodile flame-throwing tank, storming of the Senio river, Italy, Apr 1945.