"It is a desolate country," he said, as they sat round the fire; "it would be enough to give one the horrors if one were alone. It is hot now, and in the height of summer the heat and glare from the rock must be awful."

"It is, Tom; many and many a man has died of thirst in the bad lands. And what makes it more terrible is, that they can perhaps see water a thousand feet below them and yet die from the want of it."

"When we were camped on the Green River, uncle, you said that no one had ever followed it down."

"That is so, lad. One knows whereabouts it goes, as men driven by thirst have followed cañons down to it; and in some places it runs for many miles across low land before it plunges into another cañon. Then it cuts its way for two or three hundred miles, perhaps, through the hills, with walls two or three thousand feet high. No one, so far as I know, has gone down these big cañons, but it is certain there are rapids and whirlpools and rocks in them. Two or three parties have gone down through some of the shorter cañons to escape Indians, and most of them have never been heard of again, but one or two have got down some distance and managed to escape.

"No one has followed the course by land. They could not do so unless they carried all their provisions, and drink and food for their animals, and even then the expedition would take months, perhaps years to do; for every spring from the hills runs down a cañon to the river, sometimes fifty miles, sometimes a hundred long, and each time the party came upon one of these they would have to work up to the mountains to get round it. It is over a thousand miles in a straight line from the place where the Green River first enters a cañon to where the Colorado issues out on to the plains, and it may be quite twice that distance if one could follow all its windings. Some day when the country fills up attempts will no doubt be made to find out something about it; but it will be a big job whenever it is tried, and may cost a lot of lives before the cañons are all explored."

In the morning they started westward for the hills. The greatest care was observed on the march. They took advantage of every depression, and when obliged to pass over level ground moved at a distance apart, as a clump or string of moving animals would be made out at a distance from which a solitary one would be unnoticed. By noon they had left the bare rock, and were travelling up a valley clothed with grass and dotted with clumps of trees. In the first of these they halted.

"We will stay here until it begins to get dusk," Harry said, "and then move on as fast as we can go. If we don't lose our way we shall be there before morning."

There was no moon, but the stars shone brilliantly, and the mountains, with their summits still covered with snow, could be seen ahead. The chief went on in front. Sometimes they proceeded up valleys, sometimes crossed shoulders and spurs running down from the hills. They moved in Indian file, and at times proceeded at a brisk pace, at other times more slowly; but there was no halt or sign of hesitation on the part of their leader. At last, just as morning was breaking, the chief led them into a clump of trees. He moved a little distance in, and then reined in his horse and dismounted.

"Does my brother remember that?" he said to Harry, pointing to something on the ground.

"Jee-hoshaphat!" Harry exclaimed; "if that ain't my old pack-saddle! This is the very spot where we camped, boys. Well, chief, you are certainly a wonder. I doubt whether I could have found my way here in the daytime. Half a dozen times to-night it seemed to me that you were going in the wrong direction altogether, and yet you bring us as straight to the spot as if all the time you had been following a main road."