Corbeck's story is interrupted by Trelawny's revival. He embraces his daughter and joyfully approves Malcolm's courtship. Dolan and the police depart, glad to escape from the mystery, and Trelawny gathers the remaining inhabitants of the house to explain his Great Experiment. He describes how powerful Queen Tera was and explains that her spirit has been residing in the mummy cat in Trelawny's room, waiting to be reunited with its human form. Trelawny believes that the coffer, when opened by the proper formation of the lamps, will release some sort of magic that will revive the mummy and bring Tera's spirit to life. Trelawny's attack was the attempt of Tera's astral body—the mummy cat—to remove the Jewel of Seven Stars from a locked safe in his bedroom. He reveals that he has prepared a house in isolated Kyllion where the experiment is to take place.