We bound after our leader down the hill, over the rocks, and through the trees. We run for the thicket where our animals are tied. We may be too late, for horses can hear each other miles off; and the slightest concussion vibrates afar through the elastic atmosphere of these high plateaux. We reach the caballada. What is Seguin doing? He has torn the blanket from under his saddle, and is muffling the head of his horse! We follow his example, without exchanging a word, for we know this is the only plan to pursue. In a few minutes we feel secure again, and return to our watch-station on the height. We had shaved our time closely; for, on reaching the hill-top, we could hear the exclamations of Indians, the "thump, thump" of hoofs on the hard plain, and an occasional neigh, as their horses scented the water. The foremost were advancing to the spring; and we could see the long line of mounted men stretching in their deploying to the far horizon. Closer they came, and we could distinguish the pennons and glittering points of their spears. We could see their half-naked bodies gleaming in the clear moonlight. In a short time the foremost of them had ridden up to the bushes, halting as they came, and giving their animals to drink. Then one by one they wheeled out of the water, and trotting a short distance over the prairie, flung themselves to the ground, and commenced unharnessing their horses. It was evidently their intention to camp for the night. For nearly an hour they came filing forward, until two thousand warriors, with their horses, dotted the plain below us. We stood observing their movements. We had no fear of being seen ourselves. We were lying with our bodies behind the rocks, and our faces partially screened by the foliage of the pinon trees. We could see and hear with distinctness all that was passing, for the savages were not over three hundred yards from our position. They proceed to picket their horses in a wide circle, far out on the plain. There the grama grass is longer and more luxuriant than in the immediate neighbourhood of the spring. They strip the animals, and bring away their horse-furniture, consisting of hair bridles, buffalo robes, and skins of the grizzly bear. Few have saddles. Indians do not generally use them on a war expedition. Each man strikes his spear into the ground, and rests against it his shield, bow, and quiver. He places his robe or skin beside it. That is his tent and bed. The spears are soon aligned upon the prairie, forming a front of several hundred yards; and thus they have pitched their camp with a quickness and regularity far outstripping the Chasseurs of Vincennes. They are encamped in two parties. There are two bands, the Apache and Navajo. The latter is much the smaller, and rests farther off from our position.