Samuel S. Osgood, "Portrait of Edgar Allan Poe (ca. 1845)," New York Historical Society Quarterly (July 1961): 289-230.
Papers of Thomas Ollive Mabbott, Special Collections, University of Iowa Libraries; “The Premature Burial,” in Collected Works of Edgar Allan Poe, Vol. III: Tales and Sketches, ed. Thomas Ollive Mabbott (Cambridge: The Belknap Press of Harvard University Press, 1978), 953-972.