But old Mr. Harding was tugging frantically at the sheriff's arm. He was seconded by Mortlake. Interpreting the signals aright, he stopped short.

"In fact, it looked suspicious," he concluded lamely. He turned and went off, followed by Harding and Mortlake.

"How did you ever come to make such a mistake?" snarled old Harding, as they walked away much crestfallen, "we haven't a leg to stand on, now."

"Why, confound it all," retorted Mortlake, "my sister mentioned a young man being with the girl in the aeroplane, and I took it for granted that it was her brother."

"And a nice mess you've got us both into, with your 'taking it for granted,'" snorted the old miserly financier of Sandy Beach. "It looks as if we'd got ourselves in a trap now."

"Nonsense. Who's to know we have the money? I'll take the first opportunity to send it back, and no more will be heard of the matter. Lucky I didn't hide it in his aeroplane, as I intended to do."

"Yes; but we've still got the cub as our rival. I wish I could think of some plan to choke him off. That scheme of yours to blame the robbery on him would have been all right if you'd only made sure of your facts first."

"Don't worry. Our chance will come yet. I'll make that whole outfit regret bitterly that they ever stole a march on us by kidnapping that officer."

"To have discredited him with the navy would have been the best way, however," said old Harding brusquely.

"I'll find a way to do that yet," Mortlake promised.