Winding along over the wide prairie came the string of great cumbrous vehicles, their white tilts gleaming in the morning sunshine, the monotonous creaking of their axles mingling with the cheery shout of the "bullwhackers" and the crack of whips. Here and there along the line rode horsemen in twos and threes, some leading spare horses, others giving a general eye to the progress of the train. Squads of children chattered and squabbled in the waggons, a shrill feminine voice now and again rising high in remonstration. Women sat placidly sewing or knitting--indulging too in gossip--of which perhaps Yseulte Santorex was the subject more frequently than she would have guessed or approved. All were in good spirits, for their journey was nearing its end. No room was there for apprehension either, for they had now reached the extreme limits of the Sioux range. So far from all minds was any thought of danger that even scouting precautions had been of late very much relaxed. Thus they journeyed. "There's something moving away there on the bluff, Dave," said Winthrop, suddenly, shading his eyes. "D'you say so, Colonel?" answered the cowboy, who with his employer and mate was riding some little way ahead of the train. "Likely enough it's Smokestack Bill coming back. He started off in that direction before daybreak to hunt." They were skirting a range of low round-topped bluffs, on one of which had appeared the object which attracted Winthrop's attention. "It's gone now," said the latter, still gazing intently. "I could have sworn it was somebody's head." "Oh, thunder! Look!" said the cowboy, quickly reining in his horse with a jerk. Well might even his stout heart--the heart of every soul in that company--die away. For the crest of the bluff was by magic alive with mounted figures. A great sheet of flame burst forth, and amid the deafening crash of the volley a storm of leaden missiles whizzed and hummed around the ears of the party. Oregon Dave had uttered his last words. He threw up his arms with a stiffening jerk, and toppled heavily from his saddle. Then followed a scene of indescribable terror and confusion. Rending the air with their shrill, vibrating war-whoop, a vast crowd of painted horsemen swooped down in full charge upon the doomed and demoralised whites. Flinging themselves behind their trained steeds, the Sioux delivered their fire with deadly effect, then, recovering themselves in the saddle with cat-like agility, they rode in among their writhing, shrieking victims, spearing and tomahawking right and left. Perfectly mad with terror, the draught animals stampeded. Waggons were overturned, and their inmates flung screaming to the ground, or crushed and mangled beneath the wreckage.