“They were bound for this point when we first saw them,” was Hugh’s reply. “We don’t know what made them change their minds, but we have cause to be grateful to it whatever——What was that?”

He sprang to his feet and turned quickly.

“Lie down,” commanded Blaise. “They will see you.”

Hugh, unheeding, plunged down to the bateau. It was undisturbed. Not a living creature was in sight. Yet something rattling down and falling with a splash into the water had startled him. He looked about for an explanation. A fresh scar at the top of the slope showed where a piece of rock had chipped off. Undoubtedly that was what he had heard. His own foot, as he lay outstretched, had dislodged the loose, crumbling flake.

Reminded of caution, Hugh crawled back up the slope instead of going upright. The canoe was still in sight going southwest. Both boys remained lying flat until it had disappeared beyond the low point. Then they returned to the low shore beneath the overhanging rock. For the present at least there seemed to be nothing to be feared from that canoe, but would it return, and where was the man who had fired the shot and later sent that call ringing through the woods? Did he belong with the canoe party? Had he gone away with them, or was he, with companions perhaps, somewhere on the wooded ridges? The boys did not know whether to remain where they were or go somewhere else.

The weather finally brought them to a decision. All day they had hoped for a breeze, but when it came it brought with it threatening gray and white clouds. Rough, dark green patches on the water, that had been so calm all day, denoted the passing of squalls. Thunder began to rumble threateningly, and the gray, streaked sky to the north and west indicated that rain was falling there. The island to the northeast shrank to about half its former height and changed its shape. It grew dimmer and grayer, as the horizon line crept gradually nearer.

“Fog,” remarked Blaise briefly.

“It is coming in,” Hugh agreed, “and this is not a good place to be caught in a thick fog. Shall we go back into the woods?”

“I think we had best take the bateau and go along the other side of this point. We cannot start for the mainland to-night, and we shall need a sheltered place for our camp.”

The fog did not seem to be coming in very rapidly, but by the time the bateau had been shoved off, the island across the water had disappeared. The breeze came in gusts only and was not available for sailing. So the lads were obliged to take up their paddles again.