The Little Giant, as agile as a greyhound, vanished around the curve, and Will instinctively crowded himself closely and more closely against the stone wall while the dangerous bombardment went on. The animals, their instinct still guiding them, were doing the same, and Boyd's brave Selim, which was next to him, reached out his head and nuzzled Will's hand, as if he found strength and protection in the presence of the human being, who knew so much more about some things than he or his comrades did. Will responded at once. "I don't think they can get us here, Selim, old boy," he said. "The projection of the wall is slight, but it sends every rock out toward the center. Now, if you and your comrades will only be intelligent you'll keep safe." He arranged them in a row along the wall, where none would interfere with the protection of another, and standing with Selim's nose in his hand, watched the great rocks strike. Luckily at that particular point the bottom of the defile was soft earth and they sank into it, but farther up they fell with a crash on a stony floor, and when they did not split to pieces they bounded and rebounded like ricochetting cannon balls. The Little Giant returned presently, but as yet no damage had been done, although the bombardment was going on as furiously as ever. "They'll keep it up awhile," he said, as he huddled against the wall by the side of Will. "I knowed they would be up to some trick, but I didn't think 'bout them bowlders that lay thick on the mounting. They hev got 'nuff ammunition o' that kind to last a year, but arter a while thar arms will grow tired, an' then they'll grow tired too, o' not knowin' whether they hit or not. It wears out the best man in the world to keep on workin' forever an' forever without knowin' whether he's accomplishin' anything or not. All we've got to do is to hug the wall an' set tight." "Wouldn't it be well, Giant, when the bombardment lets up, to gather together our own little army and take to flight up the pass?" "An' whar would we fetch up?" "It's not likely to be a box canyon. I've read that they abound more in the southern mountains, and are not met with very often here. And even if the pass itself didn't take us out we might find a cross canyon or a slope that we could climb." "Sounds good, young William. We'll git the hosses an' mules ready, packs on 'em, and bridles in thar mouths, an' ez soon ez the arms an' sperrits o' the Sioux git tired, I'll hot foot after Jim, an' then we'll gallop up the pass."