At early dawn, they were astir, and after breakfast, which was prepared on the oil-stove, hastily embarked.
Upon reaching a bend in the river, they looked for signs of the Trailers.
"Don't even hear a sound of their boat," remarked Bob.
"They may be miles ahead by this time," suggested Sam.
"I only hope so," said Dick. "The experience of yesterday proves that a few more meetings might lead to considerable trouble."
The river narrowed a bit at this point and the banks presented a more wild and rugged appearance the further they went. A bold, rocky cliff jutted out straight ahead; the current, accelerated by its more restricted confines, eddied and swirled around its base.
The "Rambler," at half speed, had almost reached the edge of the promontory when they heard a familiar sound.
"The Nimrods!" exclaimed Bob.
His words were hardly spoken before they realized that the rival motor boat had been ensconced behind the bluff. At that instant, it shot diagonally toward the middle of the river, a roar from the engine indicating that every particle of power had been turned on.
"Here they are!" shouted Nat, with the utmost abandon. "Look sharp ahead there, in the tub! We're going to see how close we can come without hitting you!"