Fosco gives some jewels that belonged to the countess, who is listening in, to Marian, and the countess further overhears that he is leaving with Marian. The countess retrieves a long dagger and stabs him to death. The police arrive just as Fosco dies and the countess retrieves the emerald necklace Fosco tormented her with. Walter narrates the ending with his marriage to Marian and the birth of a daughter. They are living with Laura and her son, and the Countess Fosco, Anne's mother, is living in the renovated asylum, along with her emerald necklace.
