1674-1712. Scottish theologian. Born near Perth, son of a Presbyterian minister ejected in 1662 for nonconformity, he was educated at Rotterdam and at St. Andrews University, was minister of Ceres (1700-10), then became professor of divinity at St. Andrews two years before his early death. Halyburton was a champion of Reformed theology in the controversy over Deism, and this prompted his chief work which was reissued in 1865 as Essay on the Ground of Formal Reason of a Saving Faith. His other writings include Memoirs which have been frequently reprinted. of Princeton spoke most highly of Halyburton, who was regarded by others as one of Scotland's greatest theologians.