In the short story, The Fall of the House of Usher, by Edgar A. Poe, there are many instances of the literary devices twinning and doubling. Twinning, is when an object represents two of the same thing, but has one meaning. .
Besides the fact that Roderick and Madeline are not just twins but represent the mental and physical components of a single being or soul, there is also a connection between the family mansion and the remaining members who live within. Poe uses the phrase "House of Usher" to refer to both the decaying physical structure and the last of the "all time-honored Usher's." Roderick has developed a theory that the stones of the house have consciousness, and that they embody the fate of the Usher family. .
It is a small crack in "The House of Usher" which the narrator defines as "both the family and the family mansion and the fissure, which divides the house. One could say the stones represent the individual people of the Usher family, and the entire mansion stands for the whole family and the turmoil it concealed.
One of the rooms had windows which " The windows stand for Usher's eyes, the light is reality. He lives in his own world he created. Reality enters his brain only in "feeble gleams of light." "The eye.struggles in vain to reach the distinct angles of the chamber." The reality does not reach all of his brain.
Finally, note that Roderick is scared of the house and of himself. He knows that his family is known for mental illness setting him up for his own self-destruction. An example of this is in when the narrator reads from a book and hears similar noises to those he reads about. His insanity and nervous behavior causes the reader to be suspicious of Usher and the horrible aura that seems to lurk about him. Madeline gives the same foreboding feeling at first that Roderick did but with a little bit less intensity. .
As the physical house of Usher crumbles, so do the family members in turn.