He was chaplain and tutor to the 'Black' Col. John Erskine from 1705 to 1709. After studying at the
University of Edinburgh, Ralph was ordained assistant minister at
Dunfermline in 1711. He ratified the protests which his brother laid on the table of the assembly after being rebuked for his
synod sermon, but he did not formally withdraw from the establishment till 1737. He was also present at, though not a member of, the first meeting of the "associate presbytery". When the severance took place over the oath administered to burgesses, he adhered, along with his brother, to the
burgher section. == Literary works ==