The theory that the haughty Rajputs are of unsullied "Aryan blood" is scarcely any longer held even by the Rajputs themselves; they are undoubtedly of mixed origin. But the definite physical type which H. H. Risley[691] describes as characteristic of Rajputs and Jats in the Kashmir Valley, Punjab and Rajputana, shows them to be wavy-haired dark-skinned dolichocephals, linked rather with the "Caucasic" than the "Mongolian" division. Nearly related to the White Huns were the _Uigurs_, the _Kao-che_ of the Chinese annals, who may claim to be the first Turki nation that founded a relatively civilised State in Central Asia. Before the general commotion caused by the westward pressure of the Hiung-nu, they appear to have dwelt in eastern Turkestan (Kashgaria) between the Usuns and the Sacae, and here they had already made considerable progress under Buddhist influences about the fourth or fifth century of the new era. Later, the Buddhist missionaries from Tibet were replaced by Christian (Nestorian) evangelists from western Asia, who in the seventh century reduced the Uigur language to written form, adapting for the purpose the Syriac alphabet, which was afterwards borrowed by the Mongols and the Manchus. This Syriac script--which, as shown by the authentic inscription of Si-ngan-fu, was introduced into China in 635 A.D.--is not to be confused with that of the Orkhon inscriptions[692] dating from 732 A.D., and bearing a certain resemblance to some of the Runic characters, as also to the Korean, at least in form, but never in sound. Yet although differing from the Uiguric, Prof. Thomsen, who has successfully deciphered the Orkhon text, thinks that this script may also be derived, at least indirectly through some of the Iranian varieties, from the same Aramean (Syriac) form of the Semitic alphabet that gave birth to the Uiguric[693]. It is more important to note that all the non-Chinese inscriptions are in the Turki language, while the Chinese text refers by name to the father, the grandfather, and the great-grandfather of the reigning Khan Bilga, which takes us back nearly to the time when Sinjibu (Dizabul), Great Khan of the Altai Turks, was visited by the Byzantine envoy, Zimarchus, in 569 A.D. In the still extant report of this embassy[694] the Turks ([Greek: Tourkoi]) are mentioned by name, and are described as nomads who dwelt in tents mounted on wagons, burnt the dead, and raised to their memory monuments, statues, and cairns with as many stones as the foes slain by the deceased in battle. It is also stated that they had a peculiar writing system, which must have been that of these Orkhon inscriptions, the Uiguric having apparently been introduced somewhat later.