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John Dryden (1993). “The Works of John Dryden, Volume XIV: Plays; The Kind Keeper, The Spanish Fryar, The Duke of Guise, and The Vindication”, p.116, Univ of California Press
John Dryden (1808). “The Works of John Dryden: Now First Collected in Eighteen Volumes. Illustrated with Notes, Historical, Critical, and Explanatory, and a Life of the Author”, p.349