John Dryden (1998). “The Works of John Dryden, Volume XVI: Plays: King Arthur, Cleomenes, Love Triumphant, and The Secular Masque and Other Contributions to The Pilgrim”, p.145, Univ of California Press
Ebenezer Erskine (1798). “The whole works of the late Rev. Mr. Ebenezer Erskine, minister of the gospel at Stirling: consisting of sermons and discourses, on the most important and interesting subjects”, p.108