"I know from your eyes what you've seen without your telling me," said Boyd. "The Sioux are there. In some way they've picked up our trail and are coming. It's a mighty good thing that we've saved our horses.

They're in splendid trim now for a long run, and we'll need every ounce of their speed and courage."

He did not seek to disguise the full measure of the danger from Will, who, he knew, would summon his utmost courage to meet it. The lad looked again through the gla.s.ses, and was able now to see a full score of men coming on their ponies. The dawn had just spread to the south and against its red and gold they were shown sharply, a long line of black figures on the crest of a swell.

"Take a look, Jim," said young Clarke, handing him the gla.s.ses. "You'll be able to tell more about 'em than I can."

Boyd studied the picture carefully--it was in reality a picture to him--and after due deliberation, said:

"They are thirty-two, because I've counted 'em. They're comparatively fresh, because their ponies are running straight and true. They're Sioux, as I know from the style of their war bonnets, and they're after us, as I know from the way they're riding."

"But look the other way, Jim, and see how much nearer the mountains have come!"

"Aye, lad! They stand up like a fort, and if we reach 'em in time we may stave off our pursuers. They're coming fast, and they're spreading out in a long line now. That helps 'em, because it's impossible for fugitives to run exactly straight, and every time we deviate from the true course some part of their line gains on us."

"I see a huge, rocky outcrop on the mountain side. Suppose we always ride for that."

"Something to steer by, so to speak. A good idea. We won't push the horses hard at first, because it will be a long time before they come within rifle shot of us. Then maybe we'll show 'em a spurt that'll count."

But it was hard for Will not to use the utmost speed at once, as every time he looked back he saw that the Sioux were gaining, their figures and those of their horses, horse and rider seemingly one, always standing out black and clear against the rosy dawn. But he knew that Boyd was right, and he tried hard to calm the heavy beating of his pulses.

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 ma.s.s, 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.

"Yes, my four friends, you're overhauling us fast," murmured the hunter, "and I'm glad of it, because then I don't have to do so much waiting, and, when there's ugly work at hand, one likes to get it over. Ah, I think they're near enough now!"

The rifle sprang to his shoulder, a jet of flame leaped from the muzzle, and, with the sharp crack, the foremost Sioux rolled to the ground and lay still, his frightened pony galloping off at an angle. The hunter quickly pulled the trigger again and the second Sioux also was smitten by sudden death. The other two turned, but one of them was wounded by the terrible marksman, and the pony of the fourth was slain, his rider hiding behind the body. A dismal wail came from the Sioux far back. The hunter lowered his great weapon, and one hand resumed the bridle rein.

[Ill.u.s.tration: The rifle sprang to his shoulder, a jet of flame leaped from the muzzle.]

"A rifle like mine is worth more than its weight in gold," he said.

"It's worth its weight in diamonds, rubies, emeralds and all the other precious jewels at a time like this. I can say, too, that's about the best shooting I ever did, and I think it'll save us. Even the band behind, thirty or so in number, won't want to ride full tilt into rifles like ours."

"The first slopes are not more than three or four miles away now," said young Clarke, "and no matter how hard they push they can't overtake us before we reach the trees. But Jim, how are we to ride through those high mountains, and, if we abandon the horses, we might as well give up our quest."

"I chose these horses myself, Will," said Boyd, "and I knew what I was about. I trained Selim, and, of course, he's the best, but the others are real prize packages, too. Why, they can walk up the side of a cliff.

They can climb trees, and they can jump chasms fifty feet wide."

"Come down to earth, Jim. Stay somewhere in the neighborhood of truth."

"Well, maybe I do draw a rather long bow, but horses learn to be mountain climbers, and ours are the very best of that kind. They'll take us up through the ridges, never fear. The Sioux will follow, for a while, at least, but in the deep forest you see up there we'll shake 'em off."

"Hear 'em shouting now! What are they up to?"

"Making a last rush to overtake us, while we're yet in the plain. But it is too late, my gay scalp hunters!"

The mountains were now drawing near very fast, and with the heavy forest along their slopes they seemed to Will to come forward of themselves to welcome them. He became suddenly aware that his body ached from the long gallop, and that the dust raised by the beating hoofs was caked thickly on his face. His lips were dry and burning, and he longed for water.

"In five more minutes we'll be on the first slope," said Boyd, "and as we'll soon be hidden in the forest I think I'll say farewell to our pursuers."

"I don't understand you, Jim."

"I'm going to say only one word, and it'll be short and sharp."

He turned suddenly in his saddle, raised the repeating rifle and fired once at the band.

He had elevated the sight for a very long shot, regarding it as a mere chance, but the bullet struck a pony and a few moments of confusion in the band followed. Now Boyd and young Clarke made their horses use the reserves of strength they had saved so prudently, and with a fine spurt soon gained the shelter of the woods, in which they disappeared from the sight of the pursuing horde.

They found themselves among oaks, aspens, pines, cedars, and birch, and they rode on a turf that was thick, soft and springy. But Selim neighed his approval and Boyd pulled down to a walk. A little farther on both dismounted at his suggestion.

"It'll limber us up and at the same time help the horses," he said.

"Knowing what kind of rifles we carry and how we can shoot, the Sioux won't be in any hurry to ride into the forest directly after us. We've a big advantage now in being able to see without being seen. As we needn't hurry, suppose we stop and take another look with those gla.s.ses of yours, Will. I never thought they'd prove so useful when you insisted on bringing 'em."

Will obeyed at once.

"They're a mile or so away," he said, "and they've stopped. They're gathered in a semi-circle around one man who seems to be a chief, and I suppose he's talking to 'em."

"Likely! Most likely. I can read their minds. They're a little bit bashful about riding on our trail, when we have the cover of the forest.

Repeating rifles don't encourage you to get acquainted with those who don't want to know you. I can tell you what they'll do."

"What, Jim?"

"The band will split into about two equal parts. One will ride to the right and the other to the left. Then, knowing that we can't meet both with the rifles, they'll cautiously enter the mountains and try to pick up our trail. Am I right or am I wrong?"

"Right, O, true prophet! They've divided and already they're riding off in opposite directions. And what's the best thing for us to do?"

"We'll lead the horses up this valley. I see through leaves a little mountain stream, and we'll drink there all the water we want. Then we'll push on deeper and deeper into the mountains, and when we think we're clear out of their reach we'll push on."

They drank plentifully at the brook, and even took the time to bathe their hands and faces. Then they mounted and rode up the slopes, the pack horses following.

"Didn't I tell you they were first cla.s.s mountain climbers?" said Boyd with pride. "Why, mules themselves couldn't beat 'em at it."