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.

World War Two ordnance survey maps of the United Kingdom and Europe, mainly 1 inch, prepared by the Geographical Section, General Staff, and the War Office, for use by the Royal Electrical and Mechanical Engineers (REME), including 1:40,000 map of Antwerp, Belgium; 1:100,000 map of Brussels, Belgium; 1:5,000,000 map of South Africa; 1:250,000 map of Italy; and 1:50,000 map of Northeast France. Also included are German survey maps of North Africa and Northern Greece, and 1:300,000 map of the Netherlands with manuscript outline of German Army occupation districts, 1940-1943