Dick looked back once more from the heights toward the spot where their camp lay and saw lying against the blue a thin gray thread that only the keenest eye would notice. He knew it to be the smoke from Albert's fire and felt sure that all was well.
While the slope which he was ascending was fairly steep, it was easy enough to find a good trail among the pines. There was little undergrowth and the ascent was not rocky. When Dick stood at last on the crest of the ridge he uttered a cry of delight and amazement.
The slope on which he stood was merely a sort of gate to the higher mountains, or rather it was a curtain hiding the view.
Before him, range on range and peak on peak, lay mighty mountains, some of them shooting up almost three miles above the sea, their crests and heads hid in eternal snow. Far away to northward and westward stretched the tremendous maze, and it seemed to Dick to have no end. A cold, dazzling sunlight poured in floods over the snowy summits, and he felt a great sense of awe. It was all so grand, so silent, and so near to the Infinite. He saw the full majesty of the world and of the Power that had created it. For a little while his mission and all human passions and emotions floated away from him; he was content merely to stand there, without thinking, but to feel the immensity and majesty of it all.
Dick presently recovered himself and with a little laugh came back to earth. But he was glad to have had those moments. He began the descent, which was rougher and rockier than the ascent had been, but the prospect was encouraging. The valley between the ridge on the slope of which he stood and the higher one beyond it seemed narrow, but he believed that he would find in it the shelter and hiding that he and Albert wished.
As he went down the slope became steeper, but once more the pines, sheltered from the snows and cruel winds, grew to a great size. There was also so much outcropping of rock that Dick was hopeful of finding another alcove deep enough to be converted into a house.
When nearly down, he caught a gleam among the trees that he knew was water, and again he was encouraged. Here was a certainty of one thing that was an absolute necessity. Soon he was in the valley, which he found exceedingly narrow and almost choked with a growth of pine, ash, and aspen, a tiny brook flowing down its center. He was tired and warm from the long descent and knelt down and drank from the brook. Its waters were as cold as ice, flowing down from the crest of one of the great peaks clad, winter and summer, in snow.
Dick followed the brook for fully a mile, seeking everywhere a suitable place in which he and his brother might make a home, but he found none. The valley resembled in most of its aspects a great canyon, and all the fertile earth on either side of the brook was set closely with pine, ash, and aspen. These would form a shelter from winds, but they would not protect from rain and the great colds and snows of the high Rockies.
Dick noticed many footprints of animals at the margin of the stream, some of great size, which he had no doubt were made by grizzlies or silver tips. He also believed that the beaver might be found farther down along this cold and secluded water, but he was not interested greatly just then in animals; he was seeking for that most necessary of all things—something that must be had—a home.
It seemed to him at the end of his estimated mile that the brook was going to flow directly into the mountain which rose before him many hundreds of feet; but when he came to the rocky wall he found that the valley turned off at a sharp angle to the left, and the stream, of course, followed it, although it now descended more rapidly, breaking three times into little foamy falls five or six feet in height. Then another brook came from a deep cleft between the mountains on the eastern side and swelled with its volume the main stream, which now became a creek.
The new valley widened out to a width of perhaps a quarter of a mile, although the rocky walls on either side rose to a great height and were almost precipitous. Springs flowed from these walls and joined the creek. Some of them came down the face of the cliffs in little cascades of foam and vapor, but others spouted from the base of the rock. Dick knelt down to drink from one of the latter, but as his face approached the water he jumped away. He dipped up a little of it in his soft hat and tasted it. It was brackish and almost boiling hot.
Dick was rather pleased at the discovery. A bitter and hot spring might be very useful. He had imbibed—like many others—from the teaching of his childhood that any bitter liquid was good for you. As he advanced farther the valley continued to spread out. It was now perhaps a half mile in width, and well wooded. The creek became less turbulent, flowing with a depth of several feet in a narrow channel.
The whole aspect of the valley so far had been that of a wilderness uninhabited and unvisited. A mule deer looked curiously at Dick, then walked away a few paces and stood there. When Dick glanced back his deership was still curious and gazing. A bear crashed through a thicket, stared at the boy with red eyes, then rolled languidly away. Dick was quick to interpret these signs. They were unfamiliar with human presence, and he was cheered by the evidence. Yet at the end of another hundred yards of progress he sank down suddenly among some bushes and remained perfectly silent, but intently watchful.
He had seen a column of smoke rising above the pines and aspens. Smoke meant fire, fire meant human beings, and human beings, in that region, meant enemies. He had no doubt that Sioux were at the foot of that column of smoke. It was a tragic discovery. He was looking for a home for Albert and himself somewhere in this valley, but there could be no home anywhere near the Sioux. He and his brother must turn in another direction, and with painful effort lug their stores over the ridges.
But Dick was resolved to see. There were great springs of courage and tenacity in his nature, and he wished, moreover, to prove his new craft as a woodsman and mountaineer. He remained awhile in the bushes, watching the spire, and presently, to his amazement, it thinned quickly and was gone. It had disappeared swiftly, while the smoke from a fire usually dies down. It was Dick's surmise that the Sioux had put out their fire by artificial means and then had moved on. Such an act would indicate a fear of observation, and his curiosity increased greatly.
But Dick did not forget his caution. He crouched in the bushes for quite a while yet, watching the place where the smoke had been, but the sky remained clear and undefiled. He heard nothing and saw nothing but the lonely valley. At last he crept forward slowly, and with the greatest care, keeping among bushes and treading very softly. He advanced in this manner three or four hundred yards, to the very point which must have been the base of the spire of smoke—he had marked it so well that he could not be mistaken—and from his leafy covert saw a large open space entirely destitute of vegetation. He expected to see there also the remains of a camp fire, but none was visible, not a single charred stick, nor a coal.
Dick was astonished. A new and smoking camp fire must leave some trace. One could not wipe it away absolutely. He remained a comparatively long time, watching in the edge of the bushes beside the wide and open space.
He still saw and heard nothing. Never before had a camp fire vanished so mysteriously and completely, and with it those who had built it. At last, his curiosity overcoming his caution, he advanced into the open space, and now saw that it fell away toward the center. Advancing more boldly, he found himself near the edge of a deep pit.
The pit was almost perfectly round and had a diameter of about ten feet. So far as Dick could judge, it was about forty feet deep and entirely empty. It looked like a huge well dug by the hand of man.
While Dick was gazing at the pit, an extraordinary and terrifying thing happened. The earth under his feet began to shake. At first he could not believe it, but when he steadied himself and watched closely, the oscillating motion was undoubtedly there. It was accompanied, too, by a rumble, dull and low, but which steadily grew louder. It seemed to Dick that the round pit was the center of this sound.
Despite the quaking of the earth, he ventured again into the open space and saw that the pit had filled with water. Moreover, this water was boiling, as he could see it seething and bubbling. As he looked, clouds of steam shot up to a height of two or three hundred feet, and Dick, in alarm, ran back to the bushes. He knew that this was the column of vapor he had first seen from a distance, but he was not prepared for what followed.
There was an explosion so loud that it made