Brenda whirled her father and Lord Leighton--who, of course, sat beside her in front as she drove--off to supper; Merrill went to his club to ruminate happily for an hour; and the hero of the evening and his daughter drove home almost in silence, and it was a silence for which there was a very sufficient reason. Such people do not talk about trivialities when they are thinking about much more serious concerns. After supper Nitocris followed her father into the study, as he quite expected her to do, and when she had shut the door, she faced him and said in a voice that was not quite her own: "Dad, there seems to me to be only one explanation of what you did to-night. I know enough mathematics to see that it is the only one. If you tell me that I am wrong, of course I shall believe you--and then I shall ask you how else you did it." As she spoke he felt that his soul was asking itself a momentous question. She had guessed--or did she already know?--the Great Secret. And, if either, was she herself near enough to the dividing line between the two worlds for him to tell her the truth? He sat down in the chair before his writing-table and stared hard at his plotting-pad for a few moments. Then he looked up at her and saw the answer. "Niti," he said slowly, and with a little halt between the words, "you have asked me a question which I think some one else must answer, if it can be answered at all. Look behind you!" She turned swiftly, and there, almost beside her, stood--not the Mummy, but the Queen, her living other-self, royal-robed and crowned as she had been in the dim past, which was now again the present. Would she flinch or faint, or cry out with fear? If her unconscious feet had not advanced very near to the Border she would certainly do one or the other. Indeed, it was with an inward quaking of fear for her that her father had told her to turn. It might well have meant the difference between sanity and insanity, knowing what she already did of the Mummy and its mysterious disappearance. But no: there before his eyes was worked again the miracle which had already been worked in his own case, though now it was, if possible, even more marvellous than it had been before. As Nitocris turned she uttered a low cry of wonder and recognition, and held out both hands to her other twin-self. The Queen took them, and said in the Ancient Tongue, which now she understood again after many centuries: