"When a little more under my own control, I cautiously rose to my feet and looked at the mule. It was no use. On top of the fatigue of coming quite two thousand miles, he had, on that morning, been constantly traveling for fourteen hours, with only two rests of thirty minutes each. He never could get away from those fresh ponies. I looked back in the direction of the train; it was nowhar in sight and must have been back probably five miles. "In this strait I looked up again toward my savages. At that very moment the charge commenced; the whole array was bearing down upon me. I took my gun from the horn of the saddle and sat down on the ground. I felt--but no matter how I felt; I only know that at that moment I would have given my note for a large sum to have been back in Missouri. "On they swept, and I watched them coming. But somehow they began to grow smaller and smaller, and in an instant more the squadron vanished. Where the moment before an armed band, terrible with life and bristling with fury, had shone upon my eyes, now all that there was to be seen was a flock of perhaps twenty ravens, flying with short flights, and hopping and lighting around some little thing, which lay above the level of the desert. I mounted Sage and rode out to the spot, some four hundred yards away. "I found another road, and strung along it, were the carcasses of a good many cattle that had died in emigrant trains. The ravens were hopping about these carcasses and flying from one to another. I had heard of the mirage of the desert, when a boy in school, and suddenly 'I dropped upon' the whole business. By some mighty refraction of the beams of light, these miserable scavengers of the desert had been magnified into formidable, mounted warriors, and the glint of steel that I had seen, was but the shimmer of sunbeams upon their black wings. "Again I headed Sage for the river. In a little while he commenced to stretch out his nose; soon, of his own accord, he quickened his pace to a trot, a little later he took up his long lope and never relaxed his speed until he drove his nose into the delicious water of the Truckee. I dismounted and joined him. Right there we each took the biggest and longest drink of our lives; then I gave Sage one of my biscuits and ate the other myself, and we both felt immensely refreshed. I stripped the saddle and bridle from the mule and let him go. The river bank was green with grass and Sage was happy. "Throwing myself upon the ground, and laying my head upon the saddle, I composed myself for a sleep.