"There has been, I admit," said Eldridge stiffly, repeating in substance the interview he had already given out, "some flaw in our chain of reasoning. This it will be necessary to review with the object of revision. Every physical manifestation must have some physical and definite cause; and this can be found if time enough is bestowed on it. Often the process of elimination is the only method by which the truth can be determined." Darrow chuckled. "Look out the process of elimination doesn't overtake you," he remarked. Eldridge detailed the same reasoning, at greater length, to the men who had employed him. These were very impatient. Business was being not merely impeded, but destroyed. Their customers had no time for them; their employees were in many cases leaving their jobs. They called in all the help they could to assist Eldridge's speculations, but in the end they had to fall back on the scientist as the best on the market. The case was not left in his hands alone, however. After a meeting they offered a reward to any one discovering and putting to an end the disconcerting phenomena. "Here's where we make money, Jack, big money," observed Darrow when he read this offer. "It'll be bigger before we get through. You and I can have the little expedition to Volcano Island." "Nothing suits me better," said Jack. "Are you sure we'll get it?" "Sure," said Darrow. Monsieur X had of course honored the waiting world with a message. It followed the fifteen minutes of darkness: "TO THE PEOPLE: I have been patient and have stayed my hand in order that you may learn the vanity of your endeavor. Who are ye that ye shall strive to take me? Vanity and foolishness is your portion. Now ye know my power and ye will listen unto my words as to the words of the Master. Ye must hunt down this man McCarthy and deliver him over unto me. If every one of you gives himself to the task, lo! it is quickly done. Bestir yourselves against the wrath to come!" These events occupied the three days of the ordered exodus. The time was further filled with rumor that ever grew more dire. Gradually business was suspended entirely. Those who could not or would not go away stood about talking matters over, and, as is always the case, matters did not improve in the telling. The only activity in the city was that bent on seeking out the abiding-place of Monsieur X. Eldridge had now come to the conclusion that he had perhaps been mistaken in confining his efforts to so small an area. In fact, further experiments rendered hazy the arbitrary outlines formerly determined for the zone of danger. At times Monsieur X answered well within the forty-five-mile mark; at times somewhat beyond the end of the fifty-mile radius. Eldridge immediately undertook a series of more delicate experiments by means of indicators especially designed by him for the occasion. Once more the little wireless office became the focus of repertorial attention.