3. =The Later Unitarians.= The anti-trinitarian movement entered on a new stage in A.D. 1770. After Archdeacon Blackburne of London, in A.D. 1766, had started the idea, at first anonymously, in his “Confessional,” he joined in A.D. 1772 with other freethinkers, among whom was his son-in-law =Theophilus Lindsey=, in presenting to Parliament a petition with 250 signatures, asking to have the clergy of the Anglican church freed from the obligation of subscribing to the Thirty-nine Articles and the Liturgy, and to have the requirement limited to assent to the Scriptures. This prayer was rejected in the Lower House by 217 votes against 71. Lindsey now resigned his clerical office, announced his withdrawal from the Anglican church, founded and presided over a Unitarian congregation in London from A.D. 1774, and published a large number of controversial Unitarian tracts. He died in A.D. 1808. The celebrated chemist and physicist =Joseph Priestley=, A.D. 1733-1806, who had been a dissenting minister in Birmingham from A.D. 1780, joined the Unitarian movement in 1782, giving it a new impetus by his high scientific reputation. He wrote the “History of the Corruptions of Christianity,” and the “History of Early Opinions about Jesus Christ,” denying that there is any biblical foundation for the orthodox doctrine of the Trinity, and seeking to show that it had been forced upon the church against her will from the Platonic philosophy. These and a whole series of other controversial writings occasioned great excitement, not only among theologians, but also among the English people of all ranks. At last the mob rose against him in A.D. 1791. His house and all his scientific collections and apparatus were burnt. He narrowly escaped with his life, and soon after settled in America, where he wrote a church history in four vols. Of his many English opponents the most eminent was Bishop Sam. Horsley, a distinguished mathematician and commentator on the works of Sir Isaac Newton.