He was watching Griswold narrowly all the time, and saw that he was on the right track.

“Mean he had an accomplice on the Hattontown paper?” demanded Cray, looking startled.

“By no means,” Gordon returned calmly, still using Griswold’s expression as a guide. “There’s such a thing, though, as impersonation, my friend.”

It was a venturesome leap, but it proved surprisingly successful.

“By Jove!” ejaculated the millionaire, looking at the supposed Nick Carter in amazement and with a new respect. “You have hit the nail on the head, Mr. Carter! How in the world——”

Gordon shrugged his shoulders.

“Oh, it was very simple,” he confessed. “I read it all in your face.”

He rightly guessed that that would not make it seem any the less remarkable in Griswold’s eyes.

“I don’t see how,” declared the millionaire.