"I was on the point of discharging Miss Winthrop," the financier went on, "but her innocence was so thoroughly proved to me by this last affair that it would have been unjust, and so——"

Suddenly the scientist turned upon his visitor. "Do you talk in your sleep?" he demanded.

"No," was the prompt reply. "I had thought of that too. It is beyond all ordinary things, Professor. Yet there is a leak that is costing me millions."

"It comes down to this, Mr. Grayson," The Thinking Machine informed him crabbedly. "If only you and Miss Winthrop knew those plans, and no one else, and they did leak, and were not deduced from other things, then either you or she permitted them to leak, intentionally or unintentionally. That is as pure logic as two and two make four; there is no need to argue it."

"Well, of course, I didn't," said Grayson.

"Then Miss Winthrop did," declared The Thinking Machine finally, positively; "unless we credit the opposition, as you call it, with telepathic gifts hitherto unheard of. By the way, you have referred to the other side only as the opposition. Do the same men, the same clique, appear against you all the time, or is it only one man?"

"It's a clique," explained the financier, "with millions back of it, headed by Ralph Matthews, a young man to whom I give credit for being the prime factor against me." His lips were set sternly.

"Why?" demanded the scientist.

"Because every time he sees me he grins," was the reply. Grayson seemed suddenly discomfited.

The Thinking Machine went to a desk, addressed an envelope, folded a sheet of paper, placed it inside, then sealed it. At length he turned back to his visitor. "Is Miss Winthrop at your office now?"