Both voices had spoken together, the one in English and the other in the ancient tongue of Khem, yet he had heard each syllable separately and comprehended both utterances perfectly. He felt a cold grip of fear at his heart as he looked towards the mummy-case, and, as his fear had warned him, it was empty. Then he looked at his daughter, and as their eyes met, she said in the most commonplace tones: "My dear Dad, what _is_ the matter with you? If advanced people like ourselves believed in any such nonsense, I should be inclined to say that you had seen a ghost; but I suppose it's only that silly fourth dimension puzzle that's worrying you. Now, look here, you must really take your whisky and go to bed. If you go on bothering any longer about 'N to the fourth,' you will have one of your bad headaches to-morrow and won't be able to finish your address for the Institute." She put her hand out and took up the decanter. It passed without any apparent resistance through the jar. She lifted it from the same place, and poured out the usual modicum of whisky into the glass, which was standing just where the flagon was. Then she pressed the trigger of the syphon, and the familiar hiss of the soda-water brought the Professor, as he thought, back to his senses. But no! There could be no doubt about it. There in material form on the corner of his table was a point-blank, tangible contradiction of the universally accepted axiom that two bodies cannot occupy the same space, and that, come from somewhere or nowhere, there were two plainly material objects through which his daughter's hand, without her even knowing it, had passed as easily as it would have done through a little cloud of steam. Happily she had no idea of what he had seen and heard, and so for her sake he made a strong effort to control himself, and said as steadily as he could: "Thank you, Niti, it is very good of you. Yes, I think I am a little tired to-night. Good-night now, and I promise you that I will be off very soon; I will just have one more pipe, and drink my whisky, and then I really will go. Good-night, little woman. We'll have a talk about the Mummy in the morning." As soon as his daughter had closed the door, Professor Marmion returned to his writing-table. The decanter of whisky, the tumbler, and the syphon of soda-water were still standing on the corner of the table, occupying the same space as the enamelled flagon of wine and the drinking goblet which the long-dead other-self of Miss Nitocris had placed on the little silver salver. He looked about the room anxiously, with a feeling nearer akin to physical dread than he had ever experienced before; but his worst fears were not fulfilled. Nitocris the Queen had vanished and the Mummy was back in its case, blind, rigid, and silent, as it had been for fifty centuries.