Born at Bargady, Old Monkland, Lanarkshire, on September 15, 1753, to parents driven into the Secession church on account of some dissatisfaction with the moral character of their minister in the Church of Scotland. He received a country school education, was apprenticed to a sadler, and then entered into Glasgow University and passed through the ordinary Arts course, taking also classes in divinity. Having been attracted to the Reformed Presbyterian testimony, he joined the congregation at Sandhills. He was licensed to preach on August 12, 1783, and at the same time was appointed clerk to the Presbytery, a post which he held till nearly twenty years till March 1806. The necessities of the Church at the time prevented his immediate settlement in a congregation, but he had calls from Perth, Dundee, Hamilton, and Wishawtown. He was ordained over the Wishawtown congregation at Flemington, in the parish of Dalziel, on May 1, 1787, and remained there until the end of his ministry. He was the first Reformed Presbyterian minister to give himself over to much literary endeavour. Mason was strong intellectually and wrote much on prophetical and apocalyptical subjects. He died on November 19, 1831.