"Skirmishers, advance!" ordered Dutton, and several cadets detached themselves from the cavalry and rode forward. As they approached there were puffs of white smoke from the slope of the hill, and the sharp crack of rifles announced that the pickets of Major Hale's force were on the alert. The skirmishers returned the fire, and then galloped back to report.

"They're waiting for us," Dutton was informed.

"So I see," he replied. "Now, then, we'll halt here a moment. You fellows that are to pretend to build the bridge, get ready to rush when I give the word. I'll send one field piece as if to cover your movements. Are you all ready there, Stiver?" for Lieutenant Stiver, with whom Dutton had again gotten on friendly terms, was to lead the fake movement.

"All ready," was the answer.

"Then go!"

Out from the attacking force rushed a squad of cadets, bearing light planks. Of course, from the hill, it looked as if they were the advance guard of bridge builders. Particularly when there dashed out a field piece, drawn by galloping horses.

As the cadets approached the bank of the stream, and began to arrange their planks, the lads in charge of the cannon quickly wheeled it, unlimbered and fired the first shot. There was a white puff of smoke, a burst of flame, and a great bang went rattling and echoing among the hills. The battle had opened.

As Dutton had expected, his ruse deceived Hale. The latter quickly ordered up his entire artillery to shell the intrepid bridge builders. Dutton, watching through a field glass, saw the approach of the cannon.

"Forward march!" he cried to his main command. "Double quick!"

Quickness was everything now. Off they started, the real bridge builders and nearly his entire force, including Dick and his youngsters in the rear.