Keston bowed low. "Your Excellency, I would not have presumed to intrude upon you for a small matter. I have so greatly ventured because I have at length solved the final step in the mechanization of the world. I have invented a master machine to operate the switchboards in this hall and replace the workers thereat." The flabby faces of the aristos betrayed not the slightest interest, not the least surprise. Only Atuna spoke: "Interesting, if true. Can you prove your statement?" Keston strode to the canvas screen and pulled a cord. The great canvas curtains rolled back. "Here is the machine, my Lords!" His face was lit with the glow of pride of achievement. His voice had lost its reverence. Rapidly he continued: "The head of this contrivance is a bank of photo and sono-electric cells, each facet focussed on one of the screens. Through a nerve-system of copper filaments any combination of lights and sounds will actuate the proper arm which will shoot out to the required bank of buttons and press the ones necessary to meet any particular demand. That is all the prolats are doing out there, and they make mistakes, while my master machine cannot. The--" But Ladnom Atuna raised a languid hand. "Spare us these technical explanations. They bore us. All we desire to know is that the machine will do as you say." The chief flushed, and gulped. His triumph was not meeting with the acclaim he had expected. But he bowed. "Very well. With your gracious permission I shall demonstrate its operation." Atuna nodded in acquiescence. * * * * * Keston's voice rang out in crisp command. "Attention, prolats. Cease working." The long circling row suddenly jerked around; their flying fingers halted their eternal dartings. "Quickly, down to the space in front of the door to the Death Bath." A rush of hurried feet. These men and women were accustomed to instant, unquestioning obedience. "Absolute silence. Keep clear of the floor on peril of your lives." The chief wheeled to the master machine and pressed a button. Instantly, the hundreds of dangling arms telescoped out, each to a button bank where a moment before a prolat had labored. And, with a weird simulation of life, the ten forked ends of each arm commenced a rattling pressing of the buttons. Rapidly, purposefully, the metallic fingers moved over the key-boards, and on the screens we could see that the machines all over the world were continuing on their even course. Not the slightest change in their working betrayed the fact that they were now being directed by a machine instead of human beings. A great surge of admiration swept me at the marvelous accomplishment of my friend.