Papers of Harold Johann Thomas Ellingham, 1913-1970, comprising lecture notes made whilst a student at the Royal College of Science (Imperial College), 1914-1916, relating to chemistry, geology, mechanics and mathematics; biographical papers, 1945-1969; personal papers, 1914-1944, including letters of appointment; membership of societies, 1938-1970; technical assignments, 1940-1954; diary of journeys in Mesopotamia, 1917-1918; reprints of papers, 1932-1954; papers concerning the Royal School of Mines Murchison medal, 1914-1915; Ellingham's illness, 1956-1957; award of OBE, 1962; retirement from the Royal Institute of Chemistry, 1962-1963; general correspondence, including letters from Sir Henry Tizard, 1944-1963; papers and correspondence relating to Professor James Charles Philip, 1931-1946; election as Fellow of Imperial College, 1949; histories of Imperial College, 1946-1958; appointment as Special Assistant, Imperial College, 1963-1970; Imperial College Charter and internal government, 1962-1968.