and in the thin, clear atmosphere of the great plateau we'll be able to see a tremendous distance."

Will was proud of his glasses, an unusually fine and powerful pair, and from the loftiest crest they obtained a splendid view over the rolling plain. The hunter at his request took the first look. Will watched him as he slowly moved the glasses from side to side, until they finally rested on a point at the right edge of the plain.

"Your gaze is fixed at last," the boy said. "What do you see?"

"I wasn't sure at first, but I've made 'em out now."

"Something living then?"

"Buffaloes. They're miles and miles away, but they've been lying down and rolling and scratching themselves until they make the wallows you see all over the plains. It's not a big band, two or three hundred, perhaps. Well, they don't mean anything to us, except a possible supply of provisions later on. No wonder the Indians hate to see the buffaloes driven back, because the big beasts are breakfast, dinner and supper on the hoof to them."

"And maybe to us, too, Jim. I've an idea that we'll live a lot on the buffalo."

"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 horsemen, 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 pass 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 glasses 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 glasses and look! There, where the mountains seem to part and make a pass! 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 buttress it, and he kept his glasses 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 glasses 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 pass, 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 glasses, 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