Archaeological study in the Sudan, retarded for many years by political conditions, gave rich returns. The work, which had been begun by Cailliaud, Champollion, Lepsius and others, was interrupted by the rise of the Mandist power; and with the frontiers of Egypt itself menaced by dervishes, the country south of Aswan was necessarily closed to the student of antiquity. Even after the dervishes had been overthrown at the battle of Omdur man (1898) it was some time before archaeologists awoke to the sense of the historical importance of the regions thus made accessible to them. What aroused them was the danger of
submergence with which many ancient sites were threatened by the raising of the Aswan dam. A large sum of money was assigned by the Government, partly for the preservation of the visible temples in the area to be submerged, partly for an official expedition under the charge of Dr. G. A. Reisner, which was to search for all remains of antiquity hidden beneath the ground. At the same time the University of Pennsylvania dis patched the Eckley B. Coxe, jun., expedition, which devoted its attention to the southern half of Lower Nubia, from Halfa to Korosko, while the Government excavators explored from Korosko to Aswan. Thus material was acquired which throws a flood of light on the archaeology at once of Egypt and the Sudan. For though all except the southern twenty miles of Lower Nubia has been attached for purposes of administration to Egypt proper, yet this political boundary is purely artificial. The natural geographical and ethnical southern frontier of Egypt is the First Cataract; Egyptian scribes of the Old Empire recognized this truth no less clearly than Diocletian, and Juvenal anticipates the verdict of every modern observer when he describes the "porta Syenes" as the gate of Africa. The reconnaissances of Dr. Wallis Budge, Prof. A. H. Sayce, Mr. Somers Clarke, Prof. J. Garstang and more recent investigators, cover the well known monuments left by Egyptian kings whose history is tolerably familiar from other sources. The inscriptions of these kings and their officials have been collected by Prof. J. H. Breasted. But, while the central and southern Sudan is almost a virgin field for the archaeologist, the exploration of Lower Nubia has made important progress.
The Sudan is primarily and above all the country of the black races, of those Nilotic negroes whose birthplace may be supposed to have been near the Great Lakes. But upon this aboriginal stock were grafted, in very early times, fresh shoots of more vigorous and intellectual races coming, probably, from the East. Lower Nubia was one of the crucibles in which several times was formed a mixed nation which defied or actually dominated Egypt. There is some scientific ground for dating the earliest example of such a fusion to the exact period of the Egyptian Old Empire. The Ethi opians who usurped the crown of the Pharaohs from 74o-66o B.C. were of a mixed stock akin to the modern Barabra; the northern Nubians who successfully defied the Roman emperors were under the lordship of the Blemyes (Blemmyes), an East African tribe, and the empire of the Candace dynasty, no less than the Christian kingdoms which succeeded it, included many heterogeneous racial elements. The real history of the Sudan will, therefore, be con cerned with the evolution of what may be called East African or East Central African civilizations.