Instinctively all of them guessed what the character of the intruder must be. The terrible roar, and the glimpse they obtained of the great hairy body ere the fire was scattered right and left betrayed it.

“A bear!” cried Roger, voicing the discovery of his companions as well as his own.

All was confusion. Mayhew had been rather unfortunate, for he chanced to be partly in the way of the onrushing beast as it made straight for the fire, the presence of which in its den must have aroused its anger.

He was just in the act of scrambling to his feet when he was struck by the beast’s huge body, and was bowled over just as you may have seen a pin hit by a speeding ball in the alley.

Dick had somehow managed to snatch up his gun when he gained his knees. The place was now almost in darkness, since the burning brands had been scattered far and wide. The body of the infuriated animal was so bulky, however, that he could not fail to discern its outlines against the wall, where a still flickering brand chanced to lie.

The boy knew that it was no time for hesitation. No matter what had caused the animal to attack them, and even though the fire had been the first object of its rage, those who were responsible for the intrusion must come next on the list.

He thrust the long-barreled gun straight out, and, without waiting to rest the butt against his shoulder, pulled the trigger as soon as he felt the muzzle strike something yielding.

There was a muffled roar as the rifle was discharged. Dick, with the hunter instinct, instantly threw himself aside, anticipating that the wounded bear would turn upon him for revenge.

His shot had apparently not been a fatal one, though it brought another of those dreadful roars from the occupant of the cave; and now, since it was impossible for him to reload his gun unless given time, he would have to cast it aside and resort to his hunting knife.

Roger had not quite lost his senses, although the abruptness of the attack must have bewildered the boy. When he threw himself back out of the way he somehow missed connection with his gun. That it was ever in his mind was proved by the frantic way in which he instantly started to grope about on the bare rock near his feet, as though in expectation of finding it.