ACT IV.--Betrayed and deserted by her lover, Marguerite must bear the

scorn of her former companions. Siebel alone is faithful, and speaks comforting words. She goes to the church to pray; but her supplications are interrupted by the mocking fiend at her elbow, by the accusing cries of demons, and by the stern chants of the worshipers. Finally Mephistopheles appears to the sight of the wretched girl, who swoons with terror.

The return of the victorious soldiers brings back Valentine, who hears evil stories of his sister's condition. Aroused by an insulting serenade which Mephistopheles, accompanied by Faust, sings beneath Marguerite's window, Valentine engages in a duel with the latter and is wounded to the death. Dying, he curses Marguerite, who comes from the church to his side, and accuses her of bringing him to his end.