Thomas De Quincey, James Thomas Fields (1854). “De Quincey's Writings: Essays on philosophical writers and other men of letters. 1854-60. [v. 14 stereotyped”, p.142
John Milton (1846). “The Complete Poetical Works of John Milton: With Explanatory Notes and a Life of the Author, by H. Stebbing. To which is Prefixed Dr. Channing's Essay on the Poetical Genius of Milton”, p.410