William Shakespeare (1838). “The Pictorial edition of the works of Shakspere, ed. by C. Knight. [8 vols., including a vol. entitled William Shakspere, by C. Knight].”, p.281
Charles Darwin (2010). “The Works of Charles Darwin, Volume 29: “Erasmus Darwin” by Ernest Krause, with a Preliminary Notice by Charles Darwin; “The Autobiography of Charles Darwin” Edited by Nora Barlow; and Consolidated Index”, p.119, NYU Press