"Look out," warned Matt, "or you'll take a swim whether you want to or not."
"I guess dot I leaf der hitching pitzness oudt," said the chagrined Carl, "aber id vas so bicturesque dot I vish I could manach id. Now, ven I——"
Carl was interrupted by a shout, wafted toward them from across the cove. He and Matt started up and saw Dick swimming in their direction with all his might.
"What's the matter, Dick?" called Matt.
"Sharks!" came back the breathless answer.
Matt was no more than a second making up his mind what he should do. To help Dick by bringing the Grampus closer to him was out of the question—disaster might overtake the young sailor before the anchor could be lifted from the bottom.
"Ach, himmelblitzen!" murmured Carl fearfully. "Vat ve going to do, Matt?"
"Below with you, quick!" flung back the king of the motor boys. "Glennie's rifle is in the periscope room. Get that and a coil of rope and hustle back here."
Carl, shaking with excitement, hurried to carry out the order. As he vanished into the tower, Matt went forward toward the bow of the boat, keeping his keen eyes on Dick.