CLAPP, Theodore, clergyman, born in Easthamp-ton, Massachusetts, 29 March, 1792; died in Louisville, Kentucky, 17 May, 1866. He was graduated at Yale in 1814, studied theology at Andover during 1818-'9, and was ordained in Easthampton, Massachusetts, in 1822, being called in that year to the pastorate of the 1st Presbyterian church in New Orleans, Louisiana In 1834 he adopted Unitarian views, and organized, as the Church of the Messiah, a congregation largely made up of his former parishioners, with whom he continued until 1857. There were twenty epidemics during his residence in New Orleans, in-eluding yellow fever and cholera, and he was conspicuous for his laborious devotion to the sufferers. For many years the use of a large church in New Orleans was given him by its owner, Judah Touro, a wealthy Jew, free of expense. In 1857 he resigned his work, on account of failing health, and settled in Louisville, Kentucky, where he wrote "Autobiographical Sketches and Recollections of Thirty-five Years' Residence in New Orleans" (Boston, 1857), besides other theological works.