The adventurer's face went ashy white. Even she could entertain such suspicions! "You forget, Miss Santorex. My tried and trusted friend of years is in that outfit. Should I be likely to sell his scalp, even if I sold those of _your_ friends?" There was a savour of contempt in the cold incisiveness of his tone that went to her heart. What is baser than the sin of ingratitude? Did she not owe her life--and more than her life--to this man already, and now to be flinging her pitiable and unworthy suspicions at him! Would she ever recover his good opinion again? "Forgive me!" she cried. "Forgive me! I hardly knew what I was saying." And she burst into tears. Even yet she would hardly believe but that her fellow-travellers would succeed in holding their own. Young though the day was, the torrid rays of the sun blazed fiercely down upon the great plains. Some distance in front rose a rugged ridge, almost precipitous. The only passage through this for many miles was a narrow canon--a mere cleft. Beyond lay miles and miles of heavily-timbered ravines, and for this welcome shelter Vipan was making. This plan he explained to his companion. "Look! What are those?" she cried, growing suddenly eager. "Indians? No. Wild horses? I didn't know there were any wild horses in these parts." Save for a scattered line of brush here and there, the great plains until they should reach the defile above referred to were treeless, and presented a succession of gentle undulations. Nearly a mile distant, seeming to emerge from one of these belts of brush, careering along in a straggling, irregular line converging obliquely with the path of the two riders, came a large herd of ponies. It almost looked as if the latter were bent on joining them. Yseulte did not see the change in her companion's face, so intent was she on watching the ponies. "Get your horse into a gallop at once, but keep him well in hand," he said. But before she could turn to him, startled, alarmed by the significance of his tone, the sudden and appalling metamorphosis which came over the scene nearly caused her to fall unnerved from her saddle. By magic, upon the back of each riderless steed there started an upright figure, and, splitting the stillness of the morning air with its loud fiendish quaver, the hideous war-whoop went up from the throats of half a hundred painted and feathered warriors, who, brandishing their weapons and keeping up one long, unbroken, and exultant yell, skimmed over the plain, sure of their prey. "Keep quite cool, and don't look back," he said. "We've got to reach that canon before they do--and we shall. The war-pony that can overhaul old Satanta when he's in average working order has yet to be built." So far good, so far true. But the same would not precisely hold good of Yseulte's palfrey, which steed, though showy, was not much above the average in pace or staying power.