The seating of a pronounced Unitarian in the Hollis chair of theology at Harvard took place in 1805. Three years later, in 1808, the doors of Andover Seminary were opened to students. Thirty-six were present, and the number went on increasing. The example was quickly followed. In 1810 the Dutch seminary was begun at New Brunswick, and in 1812 the Presbyterian at Princeton. In 1816 Bangor Seminary (Congregationalist) and Hartwick Seminary (Lutheran) were opened. In 1819 the Episcopalian "General Seminary" followed, and the Baptist "Hamilton Seminary" in 1820. In 1821 Presbyterian seminaries were begun at Auburn, N. Y., and Marysville, Tenn. In 1822 the Yale Divinity College was founded (Congregationalist); in 1823 the Virginia (Episcopalian) seminary at Alexandria; in 1824 the Union (Presbyterian) Seminary, also in Virginia, and the Unitarian seminary at Cambridge; in 1825 the Baptist seminary at Newton, Mass., and the German Reformed at York, Pa.; in 1826 the Lutheran at Gettysburg; in 1827 the Baptist at Rock Spring, Ill. Thus, within a period of twenty years, seventeen theological schools had come into existence where none had been known before. It was a swift and beneficent revolution, and the revolution has never gone backward. In 1880 were enumerated in the United States no less than one hundred and forty-two seminaries, representing all sects, orders, and schools of theological opinion, employing five hundred and twenty-nine resident professors.[252:1] To Andover, in the very first years of its great history, came Mills and others of the little Williams College circle; and at once their infectious enthusiasm for the advancement of the kingdom of God was felt throughout the institution. The eager zeal of these young men brooked no delay. In June, 1810, the General Association of Massachusetts met at the neighboring town of Bradford; there four of the students, Judson, Nott, Newell, and Hall, presented themselves and their cause; and at that meeting was constituted the American Board of Commissioners for Foreign Missions. The little faith of the churches shrank from the responsibility of sustaining missionaries in the field, and Judson was sent to England to solicit the cooeperation of the London Missionary Society. This effort happily failing, the burden came back upon the American churches and was not refused. At last, in February, 1812, the first American missionaries to a foreign country, Messrs. Judson, Rice, Newell, Nott, and Hall, with their wives, sailed, in two parties, for Calcutta.