Edgar Allan Poe's "The Raven"

Interesting facts about "The Raven" is "The narrator asks the raven what its name is. The raven answers, "Nevermore" (line 48). He then muses that "on the morrow he will leave" like everyone else in his life (line 59). Again, the raven answers with "Nevermore" (line 60). This is the only word the raven speaks to the narrator.
Eventually, the narrator begins to ask the raven about Lenore. When he asks if Lenore is in Heaven, the raven repeats, "Nevermore" (line 90). This angers the narrator who then yells "Be that word our sign of parting, bird or fiend!" (line 97). The raven does not move. The narrator realizes that the bird will never leave because it represents his memory of Lenore which will also never leave him." 

resource: http://poestheraven.wikispaces.com/Summary