1. Bridgwater, Patrick. 2004. De Quincey’s Gothic Masquerade. Amsterdam: Rodolpi.
2. Carlyle, Thomas. 1897. The Complete Works of Thomas Carlyle, ed. Henry Duff Traill, 30 vols. New York: P. F. Collier & Sons.
3. ———. 1976. The Collected Letters of Thomas and Jane Welsh Carlyle: Vol. 4: 1826–28, ed. Ian Campbell, Aileen Christianson, and David R. Sorenson. Durham, NC: Duke University Press.
4. ———. 1984. The Collected Letters of Thomas and Jane Welsh Carlyle: Vol. 12: 1840, ed. Ian Campbell, Aileen Christianson, and David R. Sorenson. Durham, NC: Duke University Press.
5. ———. 1986. The Collected Letters of Thomas and Jane Welsh Carlyle: Vol. 14: January-July 1842, ed. Ian Campbell, Aileen Christianson, and David R. Sorenson. Durham, NC: Duke University Press.