Logician and economist, born in London, son of the preceding; was educated pedantically by his father; began to learn Greek at 3, could read it and Latin at 14, "never was a boy," he says, and was debarred from all imaginative literature, so that in after years the poetry of Wordsworth came to him as a revelation; entered the service of the East India Company in 1823, but devoted himself to philosophic discussion; contributed to the Westminster Review, of which he was for some time editor; published his "System of Logic" in 1843, and in 1848 his "Political Economy"; entered Parliament in 1865, but lost his seat in 1868, on which he retired to Avignon, where he died; he wrote a book on "Liberty" in 1859, on "Utilitarianism" in 1863, on "Comte" in 1865, and on "Sir William Hamilton's Philosophy" the same year, and left an "Autobiography"; he was a calm thinker and an impartial critic; he befriended Carlyle when he went to London, and Carlyle rather took to him, but divergences soon appeared, which, as it could not fail, ended in total estrangement; he had an Egeria in a Mrs. Taylor, whom he married when she became a widow; it was she, it would almost seem, who was responsible for the fate of Carlyle's MS. (1806-1873).