"More'n likely. Well, we could do worse."

"What are you looking at now, Jim? I see that you've shifted your objective."

"Yes, I've caught some moving black dots to the left of the herd.

They're obscured a little by a swell, but they look to me like hors.e.m.e.n, Sioux probably."

"If so then they must be hunters, taking advantage of the swell to attack the buffalo herd."

"Good, sound reasoning. You're learning to think as a scout and hunter.

Yes, they're Sioux, and they're aiming for the herd. Now they've thrown out flankers, and they're galloping their ponies to the attack. There'll be plenty of good buffalo meat in some Sioux village before long."

"That means little to us, because after the hunt the warriors will pa.s.s on. What do you see elsewhere on the plain, Jim?"

"I can make out a trace of water. It's one of the little, shallow, sandy rivers, a long distance from here, but the presence of water is probably the reason why game is grazing in the neighborhood."

"You don't see any more Indians?"

"No, Will. To the west the horizon comes plumb in that direction are a long way off, which agrees with your map. But in the north the gla.s.ses have brought the ridges and peaks a sight nearer. They're all covered with forest, except the crests of some of the higher peaks, which are white with snow. I'm thinking, too, that in the woods at the bottom of one of the slopes I can see a trace of smoke rising. Here you, Will, you've uncommon keen eyes of your own. Take the gla.s.ses and look! There, where the mountains seem to part and make a pa.s.s! Is that smoke or is it just mist?"

Young Clarke looked a long time. He had already learned from Boyd not to advance an opinion until he had something with which to b.u.t.tress it, and he kept his gla.s.ses glued upon the great cleft in the mountains, where the trees grew so thick and high. At last he saw a column of grayish vapor rising against the green leaves, and, following it with the gla.s.ses to its base, he thought he was able to trace the outlines of tepees. Another and longer look and, being quite sure, he said:

"There's an Indian village in the pa.s.s, Jim."

"That's what I thought, but I wanted you to say so, too. Now my last doubt is taken away. They're mountain Sioux, of course. I had an idea that we could go through that way and then curve to the west, but since the village is there, maybe it will be better to strike out straight across the plains."

"Perhaps those buffalo hunters will come in here to jerk their meat.

They know of the valley, of course. Have you thought of that, Jim?"

"Yes, I have, and it troubles me. It seems to me that dangers we didn't expect are gathering, and that we're about to be surrounded. Maybe we'd better put the packs on the horses, and be ready to start to-night. What do you think?"

"You know what's best, Jim."

"Not always. We're full partners, now, and in all councils of war, though there are but two of us, both must speak."

"Then I'm for getting ready to leave to-night, as soon as it's dark. I suppose it's just chance, but enemies are converging on us. It's a fine valley, one that I could stay in a long time, but we'd better leave it."

"As the two who make up the council are agreed that settles it. When the full dark comes we'll go."

Boyd, who resumed the gla.s.ses, turned them back on the buffalo hunters, saw them chase the game toward the valley, and then bring down a half-dozen.

"They're nearer now to us than they are to the mountains," he said, "and they're sure to bring the meat in here, where they can hang it on the trees, or find plenty of firewood. If we had any doubts before, Will, we've got an order now to go and not be slow about our going."

They watched the Indians a long time, and saw them cleaning and cutting up the slain buffaloes. Then they retreated to the depths of the valley, put the packs on the horses, and made ready for flight at the first coming of dusk. Luckily the night gave promise of being dark, and, when the sun had set and its last afterglow was gone they mounted, and, each followed by his packhorse, rode for the western edge of the rim. There they halted and took a last glance at a retreat in which their stay had been so brief but so welcome.

"A fine little valley," said Boyd. "It must have been hunted out years ago, but if it's left alone a few years longer the beaver will return and build along that brook. Those pools will just suit 'em. If we don't find the gold we may turn to looking for beaver skins. There are worse trades."

"At least it provides a lot of fresh air," said Will.

"And you see heaps and heaps of splendid country, all kinds, mountains, rivers, lakes, valleys, plains. Fur hunters can't complain of the lack of scenery."

"Which course will we take, Jim?"

"I think we'd better ride due west. That Indian village shuts us off from the mountains. It's true we may meet 'em on the plains, but likely we can escape 'em, and then when we've gone far enough we'll turn north and seek the ranges, where the cover is good. Now, hark to that, will you!"

From a point to the northward rose a long, quavering shout, shrill in its texture, and piercing the night like a call. A quiver ran along the lad's spine.

"A Sioux made that cry!" he exclaimed.

"Beyond a doubt," replied Boyd, "but why he did so I can't tell. Wait."

They sat, silent, on their horses, and in a minute or two the cry was repeated, but farther toward the east. Will could have mistaken the note for the howl of a wolf, it contained so much animal quality, but since the nature of the first had been told to him he knew that the second was a reply to it.

"It's signals," said Boyd with conviction. "They're talking to one another, though I don't know what they're saying. But it means the sooner we get out of the valley the better for this white army of two."

"There's nothing to keep us from starting now."

"That's true. Because, if they find us here, all knowledge of the mine for which we are looking is likely to perish with us. I don't suppose the Sioux have made any formal declaration of war, but the warning of Red Cloud is enough. They wouldn't hesitate to put out of the way two wandering fellows like ourselves."

As they talked they rode slowly toward the west, the sound of their horses' hoofs deadened on the turf, and both watching among the trees for any hostile appearance. Young Clarke was rapidly learning the ways of the wilderness, from experience, and also because he had in Boyd a teacher not excelled anywhere in the West. The calls, the long, dying cries, came again and again, showing the Sioux were steadily approaching the valley, but the two were leaving it at an equal pace.

Will clutched the reins in his left hand and held the splendid repeating rifle across the saddle bow with the other. The pack horse, unled, but obedient to his training, followed close after. Boyd, just ahead of him, proceeded in the same manner, and now they began to descend the slope that ended in the open plain. In ten more minutes they would leave the cover of the last tree. Before them rolled the bare country, swell on swell, touched but faintly by the moon, yet keen eyes such as those of the Sioux could trace the figures of horses and men on it for a considerable distance.

Will felt little shivers as they were about to leave the final row of trees. He could not help it, knowing that they were going to give up shelter for those open s.p.a.ces which, dusky though they were, were yet revealing.

"It's likely, in any event, that we'll be followed, isn't it?" he said.

"If the Sioux search the valley, and they will, they're sure to find our traces. Then they'll come over the rim of the hills on our tracks."

"Well reasoned, Will," said the hunter. "You'll learn to be a great scout and trailer, if you live long enough. That's just what they'll do, and they'll hang on to our trail with a patience that a white man seldom shows, because time means little to the Indian. As I said before, when we're far out on the plains we must make an abrupt turn toward the north, and lose ourselves among the ranges. For a long time to come the mountains will be our best friends. I love mountains anyway, Will. They mean shelter in a wild country. They mean trees, for which the eyes often ache. They mean gra.s.s on the slopes, and cool running water. The great plains are fine, and they lift you up, but you can have too much of 'em."

They rode now into the open country and in its dusky moonlight Will could not at first restrain the feeling that in reality it was as bright as day. A few hundred yards and both gazed back at the circle of hills enclosing the valley, hills and forest alike looking like a great black blur upon the face of the earth. But from the depths of that circling island came a long, piercing note, instinct with anger and menace.

"Now that was plain talk," said Boyd. "It said that they had found our trail, that they knew we were white, that they wanted our scalps, and that they meant to follow us until they got 'em."

"Which being the case," said Will defiantly, "we have to say to them in reply, though our syllables are unuttered, that we're not afraid, that they may follow, but they will not take us, that our scalps are the only scalps we have and we like 'em, that we mean to keep 'em squarely on top of our heads, where they belong, and, numerous and powerful though the Sioux nation may be, and brave and skillful though its warriors are, they won't be able to keep us from finding our mine."

"That's the talk, Will, my boy. It sounds like Red Cloud, the great Ogalala, Mahpeyalute himself. Fling 'em your glove, as the knights did in the old time, but while you're flinging it we'll have to do something besides talking. We must act. Trailers like the Sioux can follow us even in the night over the plains, and the more ground we gain in the beginning the better."

He urged his horses into a long, easy gallop and Will promptly followed at the same gait. The night darkened somewhat, at which they rejoiced, and then lightened again, at which they were sad, but they continued the long, swinging pace, which the horses could maintain for hours.

"Try your gla.s.ses again, Will," said the hunter. "They will cut through the dark a long way, and maybe they can tell if the Sioux are now in the plain."

Young Clarke slowed his pace, and bending in the saddle took a long look.

"I see nothing," he said. "Do you want to try 'em too, Jim?"

"No. Your eyes are of the best, and your news is good. It's likely that we've got a lead of seven or eight miles at least. Two or three miles more and we'd better turn for the mountains. Our horses are a lot bigger than those of the Sioux, but their ponies, though not much to look at, are made out of steel. They'd follow for days, and if we stuck to the plains they'd be sure to run us down at last."

"And we'd have little chance against a big Sioux band?"