These three groups, all now Muhammadans, but formerly Christians, constitute collectively the so-called "Nubians" of European writers, but call themselves _Barabra_, Plural of _Berberi_, _i.e._ people of Berber, although they do not at present extend so far up the Nile as that town[205]. Possibly these are Strabo's "Noubai, who dwell on the left bank of the Nile in Libya [Africa], a great nation etc.[206]"; and are also to be identified with the _Nobatae_, who in Diocletian's time were settled, some in the Kharga oasis, others in the Nile Valley about Meroe, to guard the frontiers of the empire against the incursions of the restless Blemmues. But after some time they appear to have entered into peaceful relations with these Hamites, the present Bejas, even making common cause with them against the Romans; but the confederacy was crushed by Maximinus in 451, though perhaps not before crossings had taken place between the Nobatae and the Caucasic Bejas. Then these Bejas withdrew to their old homes, which they still occupy, between the Nile and the Red Sea above Egypt, while the Nobatae, embracing Christianity, as is said, in 545, established the powerful kingdom of Dongola which lasted over 800 years, and was finally overthrown by the Arabs in the fourteenth century, since which time the Nile Nubians have been Muhammadans. There still remains the problem of language which, as shown by Lepsius[207], differs but slightly from that now current amongst the Kordofan Nubas. But this similarity only holds in the north, and is now shown to be due to Berberine immigration into Kordofan[208]. Recent investigations show that the Nuba and the Barabra, in spite of this linguistic similarity which has misled certain authors[209], are not to be regarded as belonging to the same race[210]. "The Nuba are a tall, stoutly built muscular people, with a dark, almost black skin. They are predominantly mesaticephalic, for although cephalic indices under 70 and over 80 both occur, nearly 60 per cent. of the individuals measured are mesaticephals, the remaining being dolichocephalic and brachycephalic in about equal proportions." The hair is invariably woolly. The Barabra, on the contrary, is of slight, or more commonly medium build, not particularly muscular and in skin colour varies from a yellowish to a chocolate brown. The hair is commonly curly or wavy and may be almost straight, while the features are not uncommonly absolutely non-Negroid. "Thus there can be no doubt that the two peoples are essentially different in physical characters and the same holds good on the cultural side" (p. 611). Barabra were identified by Lepsius with the Wawat, a people frequently mentioned in Egyptian records, and recent excavations by the members of the Archaeological Survey of Nubia show a close connection with the predynastic Egyptians, a connection supported also on physical grounds. It seems strange, therefore, to meet with repeated