Inc., 1991.Poe, Edgar Allan. "The Fall of the House of Usher." The American Tradition in Literature ei~th edition. Ed. George and Barbara Perkins. New York:McGraw-Hill, Inc., 1994: pgs. 1511-1523.Walker, I. M. "The Legitimate Sources of Terror in 'The Fall of the House of Usher'." Twentieth Century Interpretations of Poe's Tales. Ed. William L. Howarth. New Jersey: Prentice-Hall, Inc., 1971: pgs. 47-54....