"HENRY J ACKSON (1839-1921), English classical scholar, was born at Sheffield March 12 1839. He was educated at the Sheffield collegiate school, at Cheltenham College and at Trinity College, Cambridge, where he was elected fellow in 1864 and vice-master in 1914. From 1875 to 1906 he was praelector in Ancient Philosophy, and in 1906 was appointed Regius professor of Greek. In 1908 he was given the O.M. He resigned the vice-mastership of his college in 1919, and died at Bournemouth Sept. 25 1921. His important work in translating and commenting upon Aristotle's Ethics is alluded to in 2.513. He published Texts to Illustrate Greek Philosophy from Thales to Aristotle (1901) and a series of articles on "Plato's Later Theory of Ideas" ( Journal of Philology); also About Edwin Drood (1911). The principal articles on ancient Greek philosophers in this Encyclopedia were his contributions.