“It was a man who keeps a little hotel on a country road leading in to this place,” replied the detective. “The way I happened to hear of it was this. I’d been sent here by President Carter you see, to pick up any clews I could. Naturally I made inquiries, and the other morning I heard that the hotel clerk here had a twenty dollar gold piece, and was doubtful whether or not it was genuine. I have had some experience in counterfeiting cases, so I looked at it.

“I never saw any better money—it was Uncle Sam’s kind all right, and I asked him where he got it. He said the night clerk had taken it in, and as I was on the alert for anything like that, I kept on with my inquiries until I found that the money had been paid in by this hotel keeper I speak of—Hardy his name is. He came to town to do some buying, and stopped here for his meal.

“Naturally I went after Hardy, but so far I haven’t been able to locate him. He hasn’t been back home since he changed the money here.”

“Does that strike you as being suspicious?” asked Ned.

“No,” replied the detective, “for Hardy is well known hereabouts, and is considered honest. I’ve found out that he’s visiting relatives and expects to be back in his hotel to-day.”

“Then let’s take a run out there. We can go in the Comet if it’s far,” said Jerry eagerly.

“It’s not far enough,” said Mr. Halwell, “and besides it would create too much talk if we descended in an airship. In a case like this the less talk you stir up the better. If the burglars don’t know that we’re so close on their trail they won’t be in such a hurry to move on. We’ll go out in an auto. They’re common enough.”

They found Mr. Hardy, the hotel keeper, to be an elderly man, of a genial disposition. He had just returned from a three-days’ visit to relatives, and was very willing to talk.

“I did break the twenty dollar gold piece,” he admitted, “but I never thought it would make such a rumpus. You see this is the way it was. I was sitting all alone here one evening, a few nights ago, let me see it was on Tuesday——”

“The night of the robbery!” interrupted Jerry.