COBDO, according to the Chinese maps, lies in the northwest of Mongolia; it is bounded north and west by the government Yeniseisk, northeast by Ulianghai, and southeast by the Dsassaktu khanate, south by Kansuh, and west by Tarbagatai. The part occupied by the Ulianghai or Uriyangkit tribes of the Tangnu Mountains lies northeast of Cobdo, and north of the Sainnoin and Dsassaktu khanates, and separated from Russia by the Altai. These tribes are allied to the Samoyeds, and the rule over them is administered by twenty-five subordinate military officers, subject to the resident at Uliasutai. This city is said to contain about two thousand houses, is regularly built, and carries on some trade with Urga; it lies on the Iro, a tributary of the Jabkan. Cobdo comprises eleven tribes of Kalkas divided into thirty-one standards, whose princes obey an amban at Cobdo City, himself subordinate to the resident at Uliasutai. The Chinese rule over these tribes is conducted on the same principles as that over the other Mongols, and they all render fealty to the Emperor through the chief resident at Uliasutai, but how much obedience is really paid his orders is not known. The Kalkas submitted to the Emperor in 1688 to avoid extinction in their war with the Eleuths, by whom they had been defeated. Cobdo contains several lakes, many of which receive rivers without having any outlet. The largest is Upsa-nor, which receives from the east the River Tes, and the Íkí-aral-nor into which the Jabkan runs. The River Irtysh falls into Lake Dzaisang. The existence of so many rivers indicates a more fertile country north of the Altai or Ektag Mountains, but no bounties of nature would avail to induce the inhabitants to adopt settled modes of living and cultivate the soil, if such a clannish state of society exists among them as is described by M. Lévchine to be the case among their neighbors, the Kirghís. The tribes in Cobdo resemble the American Indians in their habits, disputes, and modes of life, more than the eastern Kalkas, who approximate in their migratory character to the Arabs. ~THE PROVINCE AND LAKE OF KOKO-NOR.~ The province of Tsing hai, or KOKO-NOR (called Tsok-gum-bam by the Tanguts), is not included in Mongolia by European geographers, nor in the Chinese statistical works is it comprised within its borders; the inhabitants are, however, mostly Mongols, both Buddhist and Moslem, and the government is conducted on the same plan as that over the Kalkas tribes further north. This region is known in the histories of Central Asia under the names of Tangout, Sifan, Turfan, etc. On Chinese maps it is politically called Tsing hai (‘Azure Sea’), but in their books is named _Sí Yu_ or _Sí Yih_, ‘Western Limits.’ The borders are now limited on the north by Kansuh, southeast by Sz’chuen, south by Anterior Tibet, and west by the desert, comprising about four degrees of latitude and eleven of longitude.