the Buret Hei, where we constantly outstrode groups of them with their cattle and herds.
We traveled quickly along the winding trail of the Buret Hei and in two days began to make the elevations of the mountain pass between the valleys of the Buret Hei and Kharga. The trail was not only very steep but was also littered with fallen larch trees and frequently intercepted, incredible as it may seem, with swampy places where the horses mired badly. Then again we picked our dangerous road over cobbles and small stones that rolled away under our horses' feet and bumped off over the precipice nearby. Our horses fatigued easily in passing this moraine that had been strewn by ancient glaciers along the mountain sides. Sometimes the trail led right along the edge of the precipices where the horses started great slides of stones and sand. I remember one whole mountain covered with these moving sands. We had to leave our saddles and, taking the bridles in our hands, to trot for a mile or more over these sliding beds, sometimes sinking in up to our knees and going down the mountain side with them toward the precipices below. One imprudent move at times would have sent us over the brink. This destiny met one of our horses. Belly down in the moving trap, he could not work free to change his direction and so slipped on down with a mass of it until he rolled over the precipice and was lost to us forever. We heard only the crackling of breaking trees along his road to death. Then with great difficulty we worked down to salvage the saddle and bags. Further along we had to abandon one of our pack horses which had come all the way from the northern border of Urianhai with us. We first unburdened it but this did
