“I had been passing alone on horseback; through a singularly dreary tract of country; and at length found myself, as the shades of the evening drew on within view of the melancholy House of Usher” (13). The narrator noticed the gloomy and melancholy moods even before going inside the House of Usher.
"Much, if not all of what I felt, was due to the bewildering influence of the gloomy furniture of the room—of the dark and tattered draperies, which, tortured into motion by the breath of a rising tempest, swayed fitfully to and fro upon the walls, and rustled uneasily about the decorations of the bed" (25). The darkness and old age of the decorations in the narrator's room made him more uneasy, therefore also making the mood of the story eerier than it already was.
"I had so worked upon my imagination as really to believe that about the whole mansion and domain there hung... an atmosphere which had no affinity with the air of heaven, but which had reeked up from the decayed trees, and the gray wall, and the silent tarn—a pestilent and mystic vapor, dull, sluggish, faintly discernible, and leaden-hued" (15).
"The impetuous fury of the entering gust nearly lifted us from our feet. It was, indeed, a tempestuous yet sternly beautiful night, and one wildly singular in its terror and its beauty... and the exceeding density of the clouds (which hung so low as to press upon the turrets of the house) did not prevent our perceiving the lifelike velocity with which they flew..." (27). The weather was beautiful, but it also contributed to the oppressive mood by being too close to the narrator and to Usher, and the strong winds reinforce the hopelessness of Roderick.
"A strange altercation had, during the last few minutes, taken place in his demeanor. From a position fronting my own, he had gradually brought round his chair, so as to sit with his face to the door of the chamber; and thus I could but partially perceive his features, although I saw that his lips trembled as if he were murmuring inaudibly" (29). Roderick's mental breakdown due to the noises he heard reflect the gloomy and grave mood of the story because he can no longer handle the anxiety his surroundings are causing him to have.
"The radiance was that of the full, setting, bloodred moon, which now shone vividly through that once barely discernible fissure... my brain reeled as I saw the mighty walls rushing asunder" (30). The collapse of the House of Usher demonstrates the sullen mood at the end of the story by showing that the once brooding house turned into nothing with the fall of the Usher family.