Then there was a pause and a dead silence, during which, in obedience to signs made by the Beaver, first one and then another crept behind the bushes to the mouth of the chimney, entered it, and began to ascend. There was a bit of a fight between Bart and Joses as to which should be first, with the result that the latter went first, then Bart followed, and the Beaver came last.

So close was it, though, that as they climbed up the steep narrow rocky slope there was a fierce yell and a rush, and they saw the light slightly obscured as the Apachés dashed by the entrance in a fierce charge, meant to overwhelm them.

Directly after the canyon seemed to be filled with yells of disappointment and rage, as the Apachés found that their intended victims had eluded them just as they had vowed their destruction.

This gave a minute’s grace, sufficient for the fugitives to get some little distance up the narrow rock passage, the Beaver and Bart pausing by the top of the steepest piece of rock about a hundred feet above the entrance, which, overshadowed as it was by trees, had a beautifully peaceful appearance as seen against the broad light of day.

All at once there was a loud yell, betokening the fact that the entrance to the chimney had been seen, and directly after a couple of Indians leaped in and began to climb.

Bart’s and the Beaver’s rifles seemed to make but one report, when the narrow chasm was filled with the vapour of exploded gunpowder, and the two Indians fell back.

“Climb,” whispered the Beaver; and Bart led the way, the chief keeping close behind him, till they were on the heels of the rest of the party, who had halted to see if they could be of use.

The entry was now hidden, and they stopped to listen, just as the successive reports of three rifles came echoing up in company with the curious pattering noise made by the bullets, which seemed as if they glanced here and there against the stones, sending fragments rattling down, but doing no farther harm, for the fugitives were not in the line of the shooters’ sight.

The retreat went on, with the Beaver and Joses taking it in turn to remain behind at a corner of the rift or some barrier of rock to keep the Apachés in check, for they kept coming fiercely on. Now and then they were checked by a shot, but in that dark narrow pass there was but little opportunity for firing, and the chief thing aimed at was retreat.

The top was reached at last, and as they neared it, to Bart’s great delight, he found that there was a strong party there, headed by the Doctor, who had heard the firing, and came to his followers’ relief.