Frank pretended to be as much in earnest as his chum.

"All right, then, I turn over the job to you, the youthful detective of Columbia High. When you get good and ready to confront the rascal with positive evidence of his villainy, give me the tip, will you? Meanwhile I'm going to keep nagging you about the same, and you can expect to have no rest unless you get real busy, and do something worth while."

"Bully for you, Frank! You're the chum worth tying to." Lanky drew a long breath, "I understand that the new eight-oared shell arrived to-day at the station. I suppose the company will deliver it to-morrow, and we can take a spin or two before the race. Have you seen it yet?"

"No, just heard about it when on the way to get you to take this jaunt to look over the course again. It hasn't been taken out of the crate yet, but several of the fellows tell me it bids fair to beat the old one all hollow," replied Frank, turning his head as if to listen.

"Well this must sure be Columbia's boss year," remarked Lanky, with a trace of pride in his voice. "We won the baseball championship after the fiercest fight ever; and now with this new shell, and the four-oared one in fine shape, there's no reason why we shouldn't walk away with the honors in the river regatta—anyhow taking two events out of three."

"You forget that Buster Billings has entered for the tub race, and promises to bring that prize to Columbia too," laughed Frank; for the comrade mentioned was the stoutest boy in the school, and as jolly as he was fat.

"And before the great day is over I reckon there'll be more than a few chaps trying the water of the Harrapin as we've been doing to-night. But what are you turning your head that way so often for, Frank?"

"I hear wheels back there somewhere," replied the other.

"Wheels? Now you give me great joy! I'm glad it was you that heard 'em first. If it had been myself I'd have been afraid the wheels were in my head, for I've had a ringing in my ears ever since I soused into the river. Wheels? I believe you hit the right nail on the head when you said that!" exclaimed the tall lad, pausing to listen.

"Yes, I was sure it must be that. Some sort of vehicle is bearing down on us, and at a pretty fair pace, too," Frank continued, positively.