“On this mountain only such men can ascend as are born of the direct line of Jenghiz Khan,” the Pandita explained to me. “Half way up the ordinary man suffocates and dies, if he ventures to go further. Recently Mongolian hunters chased a pack of wolves up this mountain and, when they came to this part of the mountainside, they all perished. There on the slopes of the mountain lie the bones of eagles, big horned sheep and the kabarga antelope, light and swift as the wind. There dwells the bad demon who possesses the book of human destinies.” “This is the answer,” I thought. In the Western Caucasus I once saw a mountain between Soukhoum Kale and Tuopsei where wolves, eagles and wild goats also perish, and where men would likewise perish if they did not go on horseback through this zone. There the earth breathes out carbonic acid gas through holes in the mountainside, killing all animal life. The gas clings to the earth in a layer about half a metre thick. Men on horseback pass above this and the horses always hold their heads way up and snuff and whinny in fear until they cross the dangerous zone. Here on the top of this mountain where the bad demon peruses the book of human destinies is the same phenomenon, and I realized the sacred fear of the Mongols as well as the stern attraction of this place for the tall, almost gigantic descendants of Jenghiz Khan. Their heads tower above the layers of poisonous gas, so that they can reach the top of this mysterious and terrible mountain. Also it is possible to explain this phenomenon geologically, because here in this region is the southern edge of the coal deposits which are the source of carbonic acid and swamp gases. Not far from the ruins in the lands of Hun Doptchin Djamtso there is a small lake which sometimes burns with a red flame, terrifying the Mongols and herds of horses. Naturally this lake is rich with legends. Here a meteor formerly fell and sank far into the earth. In the hole this lake appeared. Now, it seems, the inhabitants of the subterranean passages, semi-man and semi-demon, are laboring to extract this “stone of the sky” from its deep bed and it is setting the water on fire as it rises and falls back in spite of their every effort. I did not see the lake myself but a Russian colonist told me that it may be petroleum on the lake that is fired either from the campfires of the shepherds or by the blazing rays of the sun.