Once more they were standing together, strained with wonder, with amazement and triumph passing between them like the shuttle of a loom; once more she was caught up into high realms of excitement and dawning knowledge, the gates of which had never opened to her brain before. "To come back to the phonograph," Sir William said. "The marks are made upon the waxen disc, and they are afterwards reproduced in sound, recorded upon metal plates to remain for ever as a definite reproduction of the human voice. Now, and here I come to the final point of all, I have discovered a means by which thought can be turned into actual vision, into an actual expression of itself for every one to read. What I mean is this. I have discovered the process, and I have invented the machine by which, as a person thinks, the thought can be conveyed to any distance along the wire, can be received at the other end by an instrument which splits it up into this or that vibration. And these vibrations actuate upon a machine by the spectroscope, by the bioscope, which show them upon a screen in the form of either pictures or of words as the thoughts of the thinker are at that moment sent out by the brain in words or pictures." "Then what does this mean?" "It means that once my apparatus, whether by consent of the subject or by force, is employed to collect the thought vibrations, then no secrets can be hidden. The human soul must reveal itself. Human personality is robbed of its only defence. There will be no need to try the criminal of the future. He must confess in spite of himself. The inviolability of thought is destroyed. The lonely citadel of self exists no longer. The pious hypocrite must give his secret to the world, and sins and sinners must confess to man what only God knew before." Marjorie sat down in her chair and covered her face with her hands. Various emotions thronged and pulsed through her brain. The stupendous thing that this man had done filled her with awe for his powers, with terror almost, but with a great exultation also. She did not love him, she knew well that she had never loved him, but she realized her influence over him. She knew that this supreme intellect was hers to do with as she would. She knew that if he was indeed, as he said, master of the world, she was mistress of his mind, she was the mistress of him. The mysterious force of his love, greater than any other earthly force which he could capture or control, had made him, who could make the minds of others his slaves and instruments, the slave of her. Yes! LOVE! That, after all, was the greatest force in the whole world. Here was a more conclusive proof than perhaps any woman had ever had before in the history of humanity. Love! Even while the inmost secrets of nature were wrested from her by such a man as this, love was still his master, love was still the motive power of the world.