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.

"Our major premises we find still to be correct," announced Eldridge in the coldly didactic manner characteristic of the man. "This unknown operator is at a distance; and probably at a height. One indication we did not take sufficiently into consideration—the fact that this instrument alone is capable of communication with the instrument of this individual."

Percy Darrow for the first time began to show signs of attention. He dropped the legs of his chair to the floor and leaned forward.