The final paragraph supports this view in that the actions occur during the "full blood-red moon," a time during which vampires are able to prey upon fresh victims.
At the opposite end of this phantasmal interpretation is the modern-day psychological view that the twins represent two aspects of one personality. The final embrace, in this case, becomes the unifying of two divergent aspects into one whole being at birth. Certainly many Romantics considered birth itself to be a breaking away from supernatural beauty, and they believed that death was a reuniting of oneself with that original spirituality. Lady Madeline can then be seen as the incarnation of "otherworldliness," the pure spirit purged of all earthly cares. She is, one might note, presented in this very image; at one point in the story, she seems to float through the apartment in a cataleptic state. If Usher embodies the incertitude of life — a condition somewhere between waking and sleeping — when Lady Madeline embraces him, this embrace would symbolize the union of a divided soul, indicating a final restoration and purification of that soul in a life to come. They will now live in pure spirituality and everything that is material in the world is symbolized by the collapse of the House of Usher — the dematerialization of all that was earthly in exchange for the pure spirituality of Roderick Usher and the Lady Madeline.
Even though Poe maintains that he did not approve of symbols or allegory, this particular story has been, as suggested above, subjected to many and varied types of allegorical or symbolic interpretations. Basically, however, the story still functions as a great story on the very basic level of the gothic horror story, in which the element of fear is evoked in its highest form.
