The other whirled his horse, sent him flying for the western end of the pocket, with Rathburn close behind. They went up a steep, rocky trail, screened by boulders. When they reached the top of the west rim they looked back and saw four horsemen on the shale slope leading to the pocket. Brown evidently had split up his posse and was literally combing the hills for his quarry. "They'll know they're on the right trail when they see the remains of our dinner an' my pack down there," remarked Rathburn dryly. "But they haven't seen us yet," said Percy breathlessly. "If we can make Sunrise Canon Trail we can lose 'em in the mountains--that is if _you_ want to lose 'em." "Where's the trail?" asked Rathburn. "'Bout five miles west. It's the only trail goin' up into the big mountains between here an' the other side of the Dry Lake range, an' it's a tough one." Rathburn quickly sized up the country ahead. He saw low and high ridges with towering mountains to the right, or north, of them. There were scattering pines on the slopes and patches of timber in the wide ravines, many of which were veritable valleys. "We'll run for it while they're getting in an' out of that hole," he suddenly decided with a click of his teeth. "Their horses are in no better shape than ours. Slope along." The other had dug in his spurs even before he got the order. They rode swiftly down the steep trail from the rim of the pocket and fled across an open space and up the slope of the first ridge. Rathburn looked back as they crossed it, but could see no sign of their pursuers. His face still was troubled; his gaze kept boring into the back of the man on the horse ahead of him. At times he muttered to himself. They galloped up the hard bed of a dry arroyo and swung westward across another rock-bound ridge, picking their way carefully among the boulders. Rathburn's face became more and more strained as he noted that the leader evidently knew the country they were in like a book. Rathburn, with the experience born of years spent in the open places, was able to keep his bearings. They had followed a course for some miles north of the main trail leading east, the trail by which he had first come into the locality. Then they had doubled back westward, some miles above that trail, of course, and now were heading almost due north again, in the direction of the mountains which did not appear to be far away. He surmised that they were nearly directly north of the ranch where he had had the meal with the girl and boy. At the top of the next ridge his guide pointed above them. "See that crack in the mountain?" he said. Rathburn nodded as he made out what appeared to be a gash in the steep side of a mountain north of them. "That's Sunrise Canon," said the other quietly. "There's a trail up that canyon into the heart of the mountains where they couldn't catch us--or you, if you want to go alone--in a hundred years!" He stared steadily at Rathburn.