Charles Dickens (1867). “Charles Dickens's works. Charles Dickens ed. [18 vols. of a 21 vol. set. Wanting A child's history of England; Christmas stories; The mystery of Edwin Drood].”, p.230
Clement Greenberg, John O'Brian (1988). “The Collected Essays and Criticism, Volume 2: Arrogant Purpose, 1945-1949”, p.334, University of Chicago Press