Narrative of operations of 7 Division, 1918 by the Revd E C Crosse including reference to Clifford's service as Officer Commanding 95 Field Company, Royal Engineers; papers relating to Anglo-Italian Jubaland Boundary Commission, 1925-1928 including maps; British Somaliland-Ethiopia Boundary Commission, 1931-1936, including intelligence reports on French Somaliland, air survey operations, Walwal incident between Italian and Ethiopian troops, and printed reports on the work of the Commission; Chief Engineer, China Command, including report on Royal Engineers in Hong Kong, 1941-1942; Kenya-Ethiopia Boundary Commission, 1950-1957, including diaries, 1951-1955, printed reports, and maps of the boundary, 1946-1949; published articles by Clifford, 1928-1947, mainly on boundary commissions; technical manuals, 1924-1932, including surveying; publications and printed works, 1892-1952, including boundary commissions.

Edition of A Gazetteer of Greece published by the Permanent Committee on Geographical Names for the Admiralty and War Office (House of the Royal Geographical Society, London, 1942). Also, official 1945 edition of RAF Map Catalogue containing lists of maps of Europe, the Middle East and the Far East held by the RAF and published by Directorate of Military Survey, Middle East; Directorate of Survey, Geographical Section General Staff, India; the Australian Survey Corps; the Aeronautical Chart Service; US Army Air Forces; and the Army Map Service, US Army. Book of maps published by the Institute for Army Education relating to the British campaign in Burma, 1942-1945, and including maps of Northern Arakan, the Assam Front, the Kohima Sector, the Imphal Sector, the Irrawaddy, and campaigns in Burma and Eastern India, 1942-1945. Ministry of Defence map and air chart sales catalogue containing details of all maps and aeronautical chart series released for sale to the public by the Ministry of Defence, including world surface maps, aeronautical topographical and planning charts, and special navigational charts, 1968- 1971.