3Andrew Hook,American Literature in Context Ⅲ: 18651900 (London:Methuen & Co. Ltd. 1983),p. 64
4[10]Cleanth Brooks,R. W. B. Lewis and Robert Penn Warren, American Literature: the Makers and the Making,Vol. Ⅱ (New York:St. Martin's Press,1973) ,p. 1231.