“Where’s that man?” Potter demanded.

“I’ll see again, Mr. Waite,” said the secretary. He returned presently to say that the foreman had told Harker to report to Potter, that the man had left his machine to do so, and was not now to be found.

“Find that man,” Potter said, sharply.

“What do you want of me?” Downs asked, when the secretary hastened out to carry Potter’s orders.

“I’ve found the man who bosses the German agents in this plant!”

“This Harker?”

“Yes.”

“And you sent a messenger to tell him to report to you?”

“Yes.”

“Mr. Waite, you’re some manufacturer. I’ll admit that, but you’re a hell of a detective.”