The whole horizon was now lighted by a brilliant sun and the earth was bathed in its beams. Flight and pursuit went on, unabated, and the hunter and the boy began to increase the speed of their horses, as they saw that the Sioux were gaining. They had been riding straight as they could toward the stony outcrop, but in spite of everything they curved a little now and then, and some portion of the following line drew closer. But they were yet a full two miles away, and the mountains were drawing much nearer. Trees on the slopes detached themselves from the general mass, and became separate and individual. Once Will thought he caught a flash of water from a mountain torrent, and it increased the desirability of those slopes and ridges. How sheltered and protecting they looked! Surely Boyd and he could evade the Sioux in there!
"We'll make it easily," said Boyd, and then he added with sudden violence. "No, we won't! Look, there on your right, Will!"
Four warriors on swift ponies suddenly emerged from a swell scarcely a quarter of a mile away, and uttered a shout of triumph. Perhaps they were stray hunters drawn by the spectacle of the pursuit, but it was obvious that, in any event, they meant to co-operate with the pursuers.
"They're Sioux, too," said Boyd. "Now, steady, Will. It's a new and pressing danger, of course, but it may help us, too."
"How so?"
"I think I can give 'em a healthy lesson. We all learn by experience, and they'll take notice, if I make a good example. They're bearing down on our flank. You lead, Will, and keep straight for our rock. The four will soon be within range, as this repeating rifle of mine is a beauty, and it carries mighty far. The old muzzle loader is just a pistol by the side of it. Come on, my fine fellows! The nearer you are the better! I learned long ago to shoot from a running horse, and that's more than many Sioux can do."
The four Sioux on the right, bent low, were urging their ponies forward at their utmost speed. From the band behind came a tremendous yell, which, despite the distance, reached Boyd and young Clarke, and, apparently, they had full warrant in thus giving utterance to their feeling of triumph. The sudden appearance of the warriors coming down the dip was like the closing of a trap and it seemed that all chance of escape was cut off from the two who rode so desperately for the mountains.
The hunter shut his teeth tightly and smiled in ironic fashion. Whenever he was highly pleased he grew rather talkative, and now he had much to say for a man whose life was about to turn on a hair.
"If the four on the ponies off there knew the peril into which they were riding they wouldn't ride so hard," he said. "But the Sioux are not yet acquainted with the full merits of a long range repeating rifle, nor do they understand how well I can shoot. I'm as good a marksman as there is in the West, if I do say it myself, and lest you may think me a boaster, Will, I'll soon prove it."
He dropped the reins on the neck of Selim, who, though unguided, ran on straight and true, and grasped the splendid rifle with both hands. Will ceased to think of the band behind them and began to watch the hunter, who, though still smiling, had become one of the most dangerous of human beings.