Verst after verst of plateau goes by, with rounded rolling hills of dimpled snow, treeless, houseless, a barren waste. Then comes a crest so steep that the horses can only toil up it at a walk, and the passengers must climb beside them. The forest closes in as the height is mounted,--white leafless birches and dark green pines. The light snow is seamed with rabbit-runs, and here and there are the far-spaced tracks of deer or wild goats. A mound of stones and a small pole with a Buddhist prayer-flag--for here is the ancient home of the Buriats--mark the top of the ascent. There is a moment’s halt while you climb in and the driver tightens the saddle of the centre horse; then down the giddy descent we sweep, in full gallop once more. The pines flash past, and you hold your breath in fear of the smash that must come should a horse fall, should a trace break, should a side rut swing the sledge over. One is, however, so close to the ground that an overturn is usually harmless, save to the clothes and the nervous system, both of which are at a discount in Siberian sledging. Then too the outrigger arrangement is such that the craft turns a quarter of the way over and slides on the supplementary runner until it rights. The cold is intense. One wipes away the snow from his fur collar, and the dampness on the handkerchief has caused it to become frozen stiff. It is a crackling parchment that goes back into the pocket. Eyeglasses are unwearable, for the rising vapor from one’s breath is caught and frozen on them in an opaque film. Fingers exposed but a moment become numb and useless, and uncovering the hand is an agony. Gradually as you ride, through the great felt boots, the triple flannels, the camel’s-hair stockings, the fur-lined gloves, the coats and rugs, the cold begins to bite. You have become fatigued and depressed of a sudden. The driver points to your cheek, where the marble whiteness is eating into the flesh, and bids you rub it with snow. An involuntary shudder grips and shakes you relentlessly from head to foot. It is time to stop. If you try to go on beyond the next station you will, if the gods are lenient and you do not freeze, get out nerveless and trembling, not for hours to rally strength and energy. The chill will cling, however hot the post-house oven. Even now you are weak, beaten down, querulous, in a sudden feeble old age. The shudder means that the human animal is near his endurance limit.