The advantage to the fugitives will be understood when it is remembered that they were rapidly drawing near the ridge, now at no great distance in front. True, there was no certainty that it would prove a refuge to them, if attained; but it would be more of a shelter than the open prairie, where, if driven to bay, there was not the slightest protection against the bullets of the Sioux, unless the body of Jack should be used as a breastwork. The confusion of the bucks was only temporary. They needed no one to tell them what the aim of the youths was when they changed the line of their flight, nor could they fail to see that the ridge would be attained quite soon, unless they were checked. Tim Brophy suspected that such thoughts were passing through their minds, and despite the hopelessness of the effort, he discharged his rifle toward them; and when it is stated that it was discharged "toward them," no more can be said. There is no reason to believe that he came within twenty feet of hitting any one of the Sioux. It may be doubted, therefore, whether this essay on his part was beneficial to himself and companion, inasmuch as it must have lowered their opinion of his marksmanship and convinced the red men that they were altogether mistaken in giving heed to any more shots fired by him from the back of the pony, which was not only going at full speed, but was carrying a double burden. CHAPTER XXII. ON FOOT. The fugitives were now so close to the ridge that Warren Starr, from his position on his pony, turned his attention to their immediate front. He saw that the race must end, so far as his steed was concerned, within the next second. The trees stood close together, the ascent was steep, and the bowlders and rocks, plainly discernible, since all leafage was gone, showed that the horse must halt of necessity at the moment of striking the base of the elevation. The Sioux had ceased firing. They were so certain of capturing the youths that they saved their ammunition. The struggle could not last much longer. "Be ready to jump off!" said Warren to his companion; "I am going to stop!" Even as he spoke, he threw Jack on his haunches with a suddenness that would have pitched the couple over his head, had they not braced themselves. Both took a flying leap from his back and dashed for the cover now directly before them. The purpose was still to keep together, but circumstances beyond their control prevented. They had no time to form any plan. Young Starr darted to the right, aiming for some rocks which he fancied might afford partial shelter. Tim had his eye on a somewhat similar refuge to the left, and made for that. He would have joined his friend had he known his intention, but the seconds were too precious to allow it, after a few steps were taken. So he kept on without once glancing behind him.