Dictionary of National Biography, 1885-1900/Dealtry, William
DEALTRY, WILLIAM (1775–1847), archdeacon of Surrey, born in 1775, was the younger son of an old Yorkshire family, from whom he inherited at his father's death a small landed property. He entered St. Catharine Hall, Cambridge, when quite young, and soon migrated to Trinity College. He was second wrangler and second Smith's prizeman in 1796, and a fellow of Trinity from 1798 until his marriage in 1814. He proceeded M.A. in 1799, B.D. in 1812, and D.D. in 1829, and held for some years the living of Walton, Hertfordshire. In 1802 he was moderator in the examinations of the university. On the foundation of the East India College in Hertfordshire (Haileybury) he was appointed professor of mathematics. In 1810 he published ‘The Principles of Fluxions,’ a useful manual for students, and was about the same time elected a fellow of the Royal Society. In 1813, on the death of the Rev. John Venn, Dealtry was made rector of Clapham, and as a fervent member of the evangelical party in the church distinguished himself in the controversy which arose on the formation in 1810–12 of the British and Foreign Bible Society, which he strenuously supported. On 25 Feb. 1830 he received a prebendal stall at Winchester, and was made chancellor of the diocese; in 1845 he was appointed archdeacon of Surrey. He died at Brighton on 15 Oct. 1847. Besides the work on ‘Fluxions’ he published a large number of sermons and charges, as well as pamphlets in defence of the British and Foreign Bible Society.
[Gent. Mag. new ser. xxix. 309; Clutterbuck's Herts (Haileybury); Grover's Old Clapham.]