"During the whole of a dull, dark and soundless day in the autumn of the year, when the clouds hung oppressively low in the heavens, I had been passing alone, on horseback ... within view of the melancholy House of Usher" (13). This quote taken from the first sentence of the story, helps set the scene and notifies the reader that the mood will be very gloomy.
"A cadaverousness of complexion; an eye large, liquid, and luminous beyond comparison; lips somewhat thin and very pallid ... made up altogether a countenance not easily to be forgotten" (17). This description of Roderick Usher allows for the reader to accurately imagine his fragile and deathlike state, which adds to the overall somber mood.
"But the under surfaces of the huge masses of agitated vapor ... were glowing in the unnatural light of a faintly luminous and distinctly visible gaseous exhalation which hung about and enshrouded the mansion" (27). This depiction of a somewhat supernatural occurence helps to contribute to the mysterious and peculiar theme of the story.
" ... then, with a low moaning cry, fell heavily inward upon the person of her brother, and in her violent and now final death agonies, bore him to the floor a corpse, and a victim to the terrors he had anticipated" (30). This quotes shows the climax of the story and fills the reader with a sense sorrow as both Roderick Usher and his twin sister Madeline have met their untimely fate.
"I saw the mighty walls rushing asunder-there was a long tumultuous shouting sound like the voice of a thousand waters ... closed sullenly and silently over the fragments of the "House of Usher" (30). This last quote taken from the narrator is packed full of great description of the literal fall of the house and it concludes the story with a sort of eeriness and mystery.