Samuel Taylor Coleridge, William Greenough Thayer Shedd (1854). “The Complete Works of Samuel Taylor Coleridge: With an Introductory Essay Upon His Philosophical and Theological Opinions”, p.251
Samuel Taylor Coleridge (2015). “The Complete Plays of Samuel Taylor Coleridge: Dramatic Works of the English poet, literary critic and philosopher, author of The Rime of the Ancient Mariner, Kubla Khan and Christabel; including The Piccolomini, The Death of Wallenstein, Remorse”, p.20, e-artnow