"Let him go," he said, "he can do you no good." "Yes, he can and he _shall_." As he spoke, the captain whipped out his revolver and drove a couple of bullets through the brain of the mustang. He expected him to drop dead on the instant, when he would serve the purpose intended of a breastwork for his master. Avon had withdrawn his attention at the critical moment, fearful that the Comanches, realizing the straits of himself and companion, would overwhelm them before resistance could be offered. Thus his head was turned away from the mortally hurt horse of the captain, which, instead of sinking helpless to the earth, made a frantic leap and fell upon the unprepared youth. It seemed for the moment as if a mountain had descended upon him. He struggled fiercely to free himself, and in his desperate effort worked his head and shoulders clear, but while trying to draw his revolver for his last defence, he succumbed. The sunlight faded from before his eyes, all became blank darkness, and consciousness departed. CHAPTER XXXI. FLAG OF TRUCE. There was nothing to cause apprehension on the part of the cowboys in camp, when they heard the report of a single rifle from beyond the ridge over which Captain Shirril, Avon Burnet, and the young Comanche Shackaye had ridden in pursuit of the cattle that went astray the night before. One of the party might have found a chance to bring down something in the nature of game, which is liable to be encountered at every part of the Great Cattle Trail, from the outskirts of the capital of Texas to its termination in the State of Kansas. But when, soon after, the shots came thick and fast, it was apparent that something unusual was going on. "There's mischief afoot!" called out Gleeson, "and that Comanche is at the bottom of it. Come, boys!" There was not an instant's hesitation on the part of any member of the company. The cattle that were quietly browsing on the succulent grass were left to wander off or stampede themselves, or do whatever they chose, while the cowboys, including Nunez, the Mexican, swung into their saddles and sped away on a dead run toward the ridge. Before they reached it the missing cattle came up from the other side and appeared on the crest. The advent of the steer that had suffered so severely at the hands of Avon Burnet imparted a mild panic to the others, so that the whole lot were on a trot. The horsemen were in too great haste to turn aside, and the animals, therefore, swerved to the right and continued their brisk gait in the direction of the main herd. As has been said, every mustang was running at the highest speed, but the impetuous Gleeson maintained his place in front, and thundered up the slope as if his own life were at stake. Before he struck the crest, he rose in his box-stirrups and peered over at the plain beyond. "Just what I expected!" he exclaimed, "and that Shackaye has done it!"