Jewel of Seven Stars from a locked safe in his bedroom. He reveals that he has prepared an isolated house at Kyllion, in Cornwall, where the experiment is to take place. After this overwhelming wealth of information is revealed, Malcolm questions the implications of ancient forces interacting with new civilization. He worries about the impact on religion and monotheism if the power of the ancient Egyptian gods is proven. Trelawny also posits that the ancient Egyptians possessed contemporary scientific knowledge, such as the discovery of radium and invention of electricity. Once everyone arrives at the new house, Margaret's behavior becomes increasingly erratic, and she seems to have an uncanny knowledge of Tera's thoughts and feelings. Malcolm begins to suspect that Margaret is the astral body of Tera and fears that she will be too weak to fight off a possession, but when he relays these concerns to Trelawny and Margaret, they seem unafraid of this possibility. On the night of the experiment, a wild storm rages outside as they set up in a cave underneath the house. Margaret tells her father that Tera will not possess the mummy cat and will remain powerless until the experiment is complete, seeming to confirm that Margaret has been possessed. Somehow comforted by the confirmation of Tera's existence, they proceed with the experiment and unwrap the mummy. They discover that Tera is wearing a marriage robe, which greatly distresses Margaret. Malcolm is put in charge of turning on the electric lights after the experiment ends, and Margaret blows out the candles. As the lamps are lit, the coffer begins to glow, emitting a green vapour that passes into the sarcophagus. Suddenly, the wind from the storm shatters a window, blowing the vapour around the room, and black smoke pours out of the coffer. The room is engulfed in smoke, and Malcolm waits for the command to turn on the lights, but it never comes. The lamps slowly burn out and Malcolm fumbles in the dark, coming across the limp body of a woman whom he believes is Margaret. He carries her upstairs and leaves her in the hall while he runs for matches, but when he returns, he finds only Tera's bridal robe lying on the floor, the Jewel of Seven Stars lying where the heart would be. He returns to the cave and turns on the lights to find all of his companions