"Let's wait till they get abreast of us and give them a race," Chet suggested.
"Not on your life," objected Biff. "I'm only learning to run this tub and I'm not in the racing class yet. Besides, there are too many other boats out in the bay this afternoon. I'd be sure to run into one of them."
The boys watched as the other craft overtook them. The big motorboat ploughed noisily ahead, keeping directly in their wake.
"I wonder if the man at the helm is asleep," said Frank. "He doesn't seem to be making any attempt to pull over."
"He's awake, all right," declared Chet. "I can see him talking to the man beside him. He won't run us down. Don't worry—not with Captain Hooper at the helm, my hearties!"
The roaring of the pursuing craft suddenly took on a new note and the big boat seemed to leap out of the water as it increased its speed and bore rapidly down on the Envoy. Spray flew about the heads of the helmsman and his two passengers and a high crest of foam rose from either side of the bow. Biff Hooper shifted the wheel slightly and the Envoy veered in toward the shore. To the surprise of the boys, the other boat also changed its course and continued directly in their wake.
"The idiots!" exclaimed Biff.
"I don't get the idea of this at all," mut-
