We travelled a whole month before we came to the point where we intended to make the attempt to cross the Kevir. Hitherto everything had continued in a steady course, and one day had been like another. It was winter and we had fully 25 degrees of frost in the night: one day it snowed so thickly that the foremost camels in the train were seen only as faint shadows. For several days mist lay so dense over the desert that we had to trust chiefly to the compass. Sometimes we travelled for four or five days without finding a drop of water, but we had all we needed in our leathern bags. At the edge of the sandy desert, where high dunes are piled up by the wind, tamarisks and saxauls were often growing. Both are steppe bushes which grow to a height of several feet; their stems are hard and provided us with excellent fuel. My servants gathered large faggots, and the camp fires flamed up brightly and grandly, throwing a yellow light over the silent waste. From a village called Jandak I set out with only two men and four camels, but we had to wait for four days on the edge of the salt desert because of rain. When rain falls in the Kevir the whole desert soon becomes a sea of slippery mud, and camels cannot walk without slipping and falling. Whole caravans have perished in this cruel desert by being overtaken by rain, and in many other cases the men only have managed to escape with the loss of their camels and their merchandise. It was therefore fortunate for us that we were overtaken by rain before we were out on the slippery clay. We waited till the desert had dried up again, and then we joined forces with a caravan which came from the south. It was pitch dark when we began to move. A fire was set going, and the camels were laden by its light. Then we started, the fire disappeared, and night and the desert lay before us. Only the ring of bells disturbed the silence. We could not see where we were going, but had to trust our riding camels. The Persians marched all the morning and most of the day without a halt; the strength of both men and camels is strained to the uttermost in order to get through the desert before the next rain comes--and it may come at any moment. After a short rest we hasten northwards again, for there is no question of halting for the night. The darkness seems interminable, but at length it begins to grow light again. Still the Persians do not stop, so there is nothing for me to do but to struggle to keep up with them. "Keep awake, sir!" shouts Gulam Hussein; "you can sleep when we get to the other side." Another day passes, and again we rest awhile to give the camels some straw and to drink a cup of tea ourselves. Scarcely have we begun to enjoy the rest, however, when the chimes of the bells ring out again. The caravan is already on the move, so we pack up and follow in its trail.