"Oh, no," Guest replied indifferently. "Of course he's as strong as a horse, but the aluminium fetters and the system of india-rubber cord that you suggested, have proved all that was necessary. I can render him quite helpless directly I get inside the cell and before he could possibly reach me. Then fitting the cap is a simple matter. The head is rigid in the vulcanite depression which encloses the neck, and there is no resistance at all." "Good," Gouldesbrough answered. "Curiously enough, I found that design in a strange old book published at the time of the Reformation, detailing some of the methods of the Holy Office in Spain, with appropriate wood cuts." Guest chuckled horribly. "Of course as yet," Gouldesbrough went on in calm, even tones, "the subject has not the slightest idea what the experiments mean? He doesn't know why you fit on the receiver? He is quite in the dark?" "Entirely," Guest answered, "and he is at a loss to imagine what we are doing to him." "Ah, well," Gouldesbrough replied, "when we do tell him----" "It will be lovely," the assistant replied, tittering once more, "to watch the pictures that come on the screen when he knows that we are reading his inmost thoughts when he tries to control them, to alter them, and fails in his agony! When he realizes that he doesn't belong to himself any more!" The creature rubbed its plump and delicate hands together in an ecstasy of evil enjoyment. "I suppose," Gouldesbrough said with some slight hesitation, "you've gathered a good deal of the fellow's opinions, memories, etc., lately?" "Never had such an amusing time in all my life," Guest answered. "I've gone down and put on the cap and tied him up, and I've come up and sat alone in front of the screen in Room "D," turned on the generating current and sat in an arm-chair with a bottle of whisky at my side, and laughed till I cried! You'll learn a few home truths about yourself, William, before very long. The curious thing is, that whenever your picture comes upon the screen, it's all distorted. You are a fairly passable-looking man, as men go, William, but you should see yourself as this man sees you in his brain." He laughed once more, malicious and horrible laughter which echoed high up in the sky-light of this weird and empty place. Gouldesbrough made an impatient movement. "How do you mean?" he said. "Well," Guest answered, intensely enjoying the situation, "I've seen a good many pictures of nasty ugly looking devils and monsters, and I've been in the Weirtz Museum at Brussels, but no artist who ever painted or drew, and no man who ever modelled in wax, ever made such a face as this man's brain makes of you, when he thinks of you!" Gouldesbrough laughed grimly. "Poor devil," he said indifferently, "he naturally would. But I'm glad we have got such an excellent brain for experiment. The Pons Varolii must be exceptionally active."