The basin of Lake Ala-kul, or Alaktu-kul, occupies the southwest, and part of the Irtysh and Lake Dzaisang the northeast, so that it is well watered. The trade consists chiefly of domestic animals and cloths. The town of Kur-kara usu lies on the River Kur, northeast from Kuldja and on the road between it and Urumtsi; it is called Kingsui ching by the Chinese. The number of troops stationed at all these posts is estimated at sixty thousand, and the total population of Songaria under two millions. ~POSITION OF TIEN-SHAN NAN LU.~ The TIEN-SHAN NAN LU, or Southern Circuit of Ílí, the territory of ‘the eight Mohammedan cities,’ was named _Sin Kiang_ (‘New Frontier’) by Kienlung. It is less fertile than the Northern Circuit, the greatest part of its area consisting of rugged mountains or barren wastes, barely affording subsistence for herds of cattle and goats. The principal boundaries are the Kwănlun Mountains, and the desert, separating it from Tibet on the south; Cashmere lies on the southwest, and Badakshan and Kokand are separated from it on the west and northwest by the Belur-tag, all of them defined and partitioned by the mountain ranges over which the passes 12,000 to 16,000 feet high furnish both defence and travel according to the season. ~THE RIVER TARIM AND LOB-NOR.~ The greater part of this Circuit is occupied with the basin of the Tarim or Ergu, which flows from the Belur range in four principal branches[121] (called from the towns lying upon their banks the Yarkand, Kashgar, Aksu, and Khoten Rivers), and running eastward, receives several affluents from the north and south, and falls into Lake Lob in long. 89° E., after a course, including windings, of between 1,100 and 1,300 miles. Of the river system from which this stream flows Baron Richthofen says, “the region which gives birth to this river is on a scale of grandeur such as no other river in the world can boast. It is girt round by a wide semicircular collar of mountains of the loftiest and grandest character, often rising in ridges of 18,000 to 20,000 feet in height, while the peaks shoot up to 25,000 and even 28,000 feet. The basin which fills in the horse-shoe shaped space encompassed by these gigantic elevations, though deeply depressed below them, stands at a height above the sea varying from 6,000 feet at the margin to about 2,000 in the middle, and formed the bed of an ancient sea. From its wall-like sides on the south, west, and north, the waters rush headlong down, and though the winds blowing from all directions deposit most of their moisture on the remoter sides of the surrounding ranges, viz., the southern foot of the Himalayas, the west side of the Pamir, and the northern slope of the Tien shan, the streams formed thereby winding through the cloud-capped lofty cradle-land, and breaking through the mountain chains, reach the old ocean bed only partly well watered. The smallest of them disappear in the sand, others flow some distance before expanding into a level