They paddled strenuously for an hour toward the south, and by that time were beginning to feel their muscles growing somewhat sore. The season was young, and they had not as yet become wholly accustomed to hard manual labor, though all of them used the school gymnasium through the winter months in the endeavor to keep in condition.

“Talk about your combers, these are the real thing,” grunted Jerry, as he shot up on the crest of a wave, from which exalted position he had a fleeting view of the island dead ahead; and was then swept down into what seemed to be a valley.

The fact that each boat was so heavily laden added to the danger of their swamping if once they turned sideways to the seas, or broached to; but the boys were conscious of this ever-impending peril, and fought tooth and nail to prevent it.

Wildcat Island was quite a large piece of ground, standing in the lake at some little distance from either shore, but much nearer the western one, that upon which the town of Newtonport was situated, with its distant range of hills, called the Sunset Mountains by the natives.

This island lay not far from the foot of the lake, while another, going by the name of Snake Island, was situated close to the lumber camp at the head of the body of water, which was some ten miles long by between one and two wide.

With a strong south wind blowing, a heavy sea could be kicked up, though naturally this would be found much worse the farther up the lake one went.

“Ten minutes more will see us there, boys!” shouted Frank.

He feared that one of the other paddlers might be getting pretty near his last effort, and wished to encourage the balance of his chums to renewed efforts.

“We’re all right; don’t worry about us,” called back Bluff, who happened to be a little bit ahead.

He had hardly spoken than he came close to the verge of disaster. To make his voice carry the better, Bluff had half turned his head, and in doing this lost his advantage just a trifle. So it came that the next sea struck the Red Rover on the forward port side, instead of head on. This caused the frail canoe to sheer out of her course, amid frantic efforts of her wearied skipper to regain a straightaway heading; and only for the fact that a second sea did not follow closely on the heels of the first, he might have met with an upset.