The excerpt that conveys the eerie tone of the passage is:
"As I heard the wind moan among the trees, I caught a reflection of this accursed visage in the pane of glass, as though it were staring through the window at me."
This line evokes a sense of dread and supernatural tension, capturing the unsettling atmosphere of the scene. The mention of the "accursed visage" and the wind moaning adds to the eeriness and fear experienced by the narrator.