"The Mans-Tien, the Mans-Coc, the Mans-Meo (Miao, Miao-tse, or Mieu) present a pretty complete identity with the Pan-y and the Pan-yao of South Kwang-si; they are the debris of a very ancient race, which with T. de Lacouperie may be called pre-Chinese. This early race, which bore the name of _Pan-hu_ or _Ngao_, occupied Central China before the arrival of the Chinese. According to M. d'Hervey de Saint-Denys, the mountains and valleys of Kwei-chau where these Miao-tse still survive were the cradle of the Pan-hu. In any case it seems certain that the T'hai and the Man race came from Central Asia, and that, from the anthropological standpoint, they differ altogether from the Mongol group represented by the Chinese and the Annamese. The Man especially presents striking affinities with the Aryan type." Thus is again confirmed by the latest investigations, and by the conclusions of some of the leading members of the French school of anthropology, the view first advanced by me in 1879, that peoples of the Caucasic (here called "Aryan") division had already spread to the utmost confines of south-east Asia in remote prehistoric times, and had in this region even preceded the first waves of Mongolic migration radiating from their cradle-land on the Tibetan plateau[459]. Reference was above made to the singular lack of political cohesion at all times betrayed by the Tai-Shan peoples. The only noteworthy exception is the Siamese branch, which forms the bulk of the population in the Menam basin. In this highly favoured region of vast hill-encircled alluvial plains of inexhaustible fertility, traversed by numerous streams navigable for light craft, and giving direct access to the inland waters of Malaysia, the Southern Shans were able at an early date to merge the primitive tribal groups in a great nationality, and found a powerful empire, which at one time dominated most of Indo-China and the Malay Peninsula. Siam, alone of all the Shan states, even still maintains a precarious independence, although now again reduced by European aggression to little more than the natural limits of the fluvial valley, which is usually regarded by the Southern Shans as the home of their race. Yet they appear to have been here preceded by the Caucasic Khmers (Cambojans), whose advent is referred in the national chronicles to the year 543 B.C. and who, according to the Hindu records, were expelled about 443 A.D. It was through these Khmers, and not directly from India, that the "Sayamas" received their Hindu culture, and the Siamese annals, mingling fact with fiction, refer to the miraculous birth of the national hero, Phra-Ruang, who threw off the foreign yoke, declared the people henceforth T'hai, "Freemen," invented the present Siamese alphabet, and ordered the Khom (Cambojan) to be reserved in future for copying the sacred writings.