There seemed to be reason in this conclusion, and both agreed upon it. At the end of a couple of hours their horses had rested sufficiently, and they were mounted again. They had trusted to the mustangs to act as sentinels while they spent their time in eating and talking, and, no alarm having been given, they were satisfied that there was no one in the vicinity, and they rode off toward the northeast, without any concern of present danger threatening them. By this time the moon was in the sky; but a few clouds were occasionally scudding before his face, so that the prairie was not illuminated with as much clearness as upon the preceding night. The two hunters galloped along at a swinging gallop, a rate of speed which their mustangs were capable of continuing for hours and which it was the purpose of the riders to keep up until their destination was reached. Now and then, through the stillness of the night, the cries of wild animals came to their ears, and once or twice these sounded very much like signals from parties of Indians. Tom and Dick never once relaxed their vigilance, but, as far as the gloom would permit, scanned the country about them in every direction. Besides, they occasionally caught the glimmer of camp fires, but they were all at such a distance that they paid no attention to them, but continued on the even tenor of their way. Just as day was breaking, they found themselves fairly among the mountains. The wildest crags and peaks were all about them, and they were compelled to keep close to the pass they were following. This wound in and out among the fastnesses, not more than a hundred feet in width in some places, while in others it was fully a quarter of a mile broad. Here they were in constant apprehension of meeting with their old enemies; but there was an air of solitude and desertion about them that was impressive in the extreme. They halted but a short time to let their animals "blow," while they themselves made an observation. Still nothing new or alarming was discovered, and they hurried forward as before. Just as the sun reached meridian, the two hunters came upon that place known as Devil's Pass, which they were certain had witnessed a fearful tragedy during the previous twenty-four hours. CHAPTER VII. THE CAVALRY ESCORT.