Classic Criticism
Chesterton, Gilbert Keith. "Our Mutual Friend," in Appreciations and Criticisms of the Works of Charles Dickens. London: J.M. Dent and Sons, ltd., 1911. E-text
Gissing, George. Charles Dickens: A Critical Study. London: Blackie, 1898. (Discusses Our Mutual Friend, but not separately.)
Johnson, Edgar. "The Great Dust-Heap," in Charles Dickens: His Tragedy and Triumph. New York: Simon and Schuster, 1952.
Miller, J. Hillis. "Our Mutual Friend," in Charles Dickens: The World of His Novels. Cambridge: Harvard University Press, 1959.
Swinburne, Algernon Charles. "Charles Dickens." Quarterly Review, July 1902. E-text excerpt.
Wilson, Edmund. "Dickens: The Two Scrooges," in The Wound and the Bow. New York: Oxford University Press, 1941.