The setting in Chapter 19 of 'The Fall of the House of Usher' mirrors Victor's inner turmoil by conveying a mood of insufferable gloom and decay that reflects his feelings and foreshadows the story's dark conclusion.
In The Fall of the House of Usher by Edgar Allan Poe, the setting is deeply intertwined with Victor's inner turmoil, especially in Chapter 19. The grim atmosphere of the Usher house mirrors Victor's distress and reflects the themes of decay and despair prevalent throughout the story. The house is described with a sense of insufferable gloom that parallels Victor's sense of dread. Additionally, the narrator's observation that rearranging the details of the scene could modify its sorrowful impression suggests an introspective look into Victor's ability to shape his perception and the inevitability of doom that reflects his own psyche.
As the story unfolds, the house's physical state, with its eroding walls and overgrown vegetation, symbolizes the deteriorating mental state of its inhabitants. The narrator's disillusionment and the use of reflection serve as a clever literary device to underscore the connection between the environment and the characters' inner lives. Moreover, the physical reflection of the house in the tarn accentuates the theme, providing a visual representation of the internal decay and the intertwined fates of the characters and their physical surroundings. This all culminates in a setting that is essentially a 'house of mirrors', with its bleak reflections creating an inescapable sense of darkness and despair that foreshadows the eventual downfall.