Just as they were practicing swift dives, a bugle call rang clear and full across the water.

“The ‘recall’,” gasped Billy. “Wonder what’s doing?”

“That means everybody report at once,” said Don Miller, leader of the Fox patrol. “Back to shore, fellows.”

“Hit her up, son!” added Walter, and, suiting his action to his words, he slid rapidly through the clear water, leaving a wake of swirling ripples.

As soon as the swimmers reached shore, they hurried to their respective cabins, dressed, attended to their beds, and then repaired to the larger log-house, where a bountiful breakfast was served. During the meal the talk was all of the eagerly anticipated meeting of the patrols, and everyone wondered why it had been called.

Mess over, Don Miller and Walter Osborne took their stand at either side of the cabin door, and as each boy passed out he saluted the two chiefs with the scout’s salute, and was saluted in return. This was a point of etiquette upon which Lieutenant Denmead, who was a retired officer of the United States Army, always insisted, believing that it did much to maintain discipline and to instill the scout virtues of courtesy and of respect for superior officers.

CHAPTER II.
FORMING THE SIGNAL CORPS.

A cheer, heartier and more informal than military, rose from forty throats, as Lieutenant Denmead and Assistant Scout Master Rawson came forth from their quarters to break the news to the assembled boys.

“Scouts of Pioneer Camp,” began the lieutenant, smiling, when silence had been restored, “I have called this meeting in order to lay before you a plan which I think will merit your approval.

“Most of you have heard that in two weeks there are to be National Guard maneuvers over in Oakvale and the adjoining meadows, not far from here?”