Harold Foster Hallet was born in 1886, and was an engineering pupil at the work and shipyard of Messrs Young and Co at Poplar from 1904 to 1908, during which time he gained a BSc in Engineering from the University of London. In 1912 he gained an MA in Mental Philosophy from the University of Edinburgh, and went on to become a Lecturer in Logic, and Assistant in Logic and Metaphysics (1912-1916) and an Assistant in Moral Philosophy, 1915-1916. In 1919 Hallett was appointed Assistant Lecturer, 1919-1922, and Lecturer, 1922-1931, in Philosophy at the University of Leeds. He became Professor of Philosophy at King's College London from 1931 to 1951. Hallett was also the British Secretary of the Societas Spinoza, 1929-1935, Chairman of the Board of Philosophical Studies at the University of London, 1935-1945, and the author of numerous books and articles on philosophy.
From the guide to the Hallett, Harold Foster, 1910-1959, (Senate House Library, University of London)