Explain who the narrator is and his presence in The Fall of the House of Usher.
"The Fall of the House of Usher" is told from the point of view of the unnamed narrator, who, being skeptical and rational, doesn't want to believe that there are supernatural causes to what is happening around him. Although he tries to tell the reader that Roderick's anxiety and nervousness are simply symptoms of the latter's mental anguish, the narrator, and therefore the reader, becomes increasingly disturbed as the story progresses. By telling the story from the point of view of a skeptic rather than a believer, Poe increases the suspense as well as the emotional impact of the story's ending.
The narrator is a previous aquaintance of Roderick Usher, and is called upon during his friend's final days. Summoned through a letter, the narrator shows up during Roderick's sister's final days. Once she dies, the narrator assists Roderick with her "burial". Afterwards, Roderick ends up going crazy. Along with Roderick's craziness, the narrator begins to experience some of the same symptoms. Are they real, or supernatural??