In India the Aryans were from late Vedic times divided into four castes—Brahmans (priests), Kshatriyas (kings and warriors), Vaisyas (traders, &c.), and Sudras (aborigines). Caste (Varna) signifies “colour”, but it is not certain whether the reference is to be given a physical or mythological application. The first three castes were Aryans, the fairest people; the fourth caste, that comprising the dark-skinned aborigines, was non-Aryan. “Arya”, however, was not always used in the sense that we have been accustomed to apply “Aryo-Indian”. In one of the sacred books of the ancient people it is stated: “The colour of the Brahmans was white; that of the Kshatriyas red; that of the Vaisyas yellow; and that of the Sudras black”.[7] This colour reference connects “caste” with the doctrine of yugas, or ages of the universe (Chapter VI). [7] Muir's _Original Sanskrit Texts_, vol. 1, p. 140. Risley, dealing with “the leading castes and tribes in Northern India, from the Bay of Bengal to the frontiers of Afghanistan”, concludes from the data obtained from census returns, that we are able “to distinguish two extreme types of feature and physique, which may be provisionally described as Aryan and Dravidian. A third type, which in some respects may be looked upon as intermediate between these two, while in other, and perhaps the most important, points it can hardly be deemed Indian at all, is found along the northern and eastern borders of Bengal. The most prominent characters are a relatively short (brachycephalic) head, a broad face, a short, wide nose, very low in the bridge, and in extreme cases almost bridgeless; high and projecting cheekbones and eyelids, peculiarly formed so as to give the impression that the eyes are obliquely set in the head.... This type ... may be conveniently described as Mongoloid....”[8] [8] _The Tribes and Castes of Bengal_, H. H. Risley, vol. 1, xxxi. According to Risley, the Aryan type is dolichocephalic (long-headed), “with straight, finely-cut (lepto-rhine) nose, a long, symmetrical narrow face, a well-developed forehead, regular features, and a high facial angle”. The stature is “fairly high”, and the body is “well proportioned, and slender rather than massive”. The complexion is “a very light transparent brown—‘wheat coloured’ is the common vernacular description—noticeably fairer than the mass of the population”.