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.