FIRTH, SIR CHARLES HARDING Brit ish historian, was born at Sheffield on March 16, 1857, and was educated at Clifton and Balliol college, Oxford. He became a fellow of All Souls, Oxford, in 1901, and regius professor of modern history at Oxford in 1904. On his retirement in 1925 he became professor emeritus. Firth's historical work was almost entirely confined to English history during the time of the Great Civil War and the Commonwealth ; and his books are of great value to students of this period. The chief of them are : Life of the Duke of Newcastle (1886) ; Scotland and the Commonwealth (1895) ; Scotland and the Protectorate (1899); Narrative of General Venables (1900) ; Oliver Cromwell (1900) ; Cromwell's Army (1902) ; The Last Years of the Protectorate (1909) ; Eng lish History in English Poetry ; Modern History in Oxford, 1841-1918 (192o) ; and the standard edition of Ludlow's Memoirs (1894). He also edited the Clarke Papers (1891-1901), and Mrs. Hutchinson's Memoirs of Colonel Hutchinson (1885 ) and wrote an introduction to the Stuart Tracts (1903) , and con tributed to the Dictionary of National Biography and the Cam bridge Modern History.