The relationship soon deteriorates, however, and a violent altercation ensues between the two William Wilsons. The scuffle evokes in the narrator memories of his infancy, which makes him grow only more obsessed with William Wilson. On a night not long after the scuffle, the narrator sneaks into his rival’s bedroom to play a practical joke. Shining the light from his lamp on his rival’s face, the narrator realizes that William Wilson’s face appears identical to his own. Terrified, the narrator rushes from the room.

After several months, the narrator becomes a student at an elite boarding school, Eton, and attempts to leave behind memories of the other William Wilson. He abuses alcohol in this effort to forget the past, and he recalls one particularly wild party. Amid the drunken revelry, a servant announces the presence of a mysterious guest calling for the attention of the narrator. Excited and intoxicated, the narrator rushes to the vestibule, only to discover a youth of his same size and dress. The faintness of the light prevents the narrator from discerning the visitor’s face. Grabbing the narrator’s arm, the guest whispers “William Wilson” in the narrator’s ear and quickly vanishes.