All the prehistoric cemeteries are of this type, with the graves pressed closely together, so that they often impinge upon one another. The nearness of the graves to the surface is due to the exposed positions, at the entrances to _wadis_, in which the primitive cemeteries are usually found. The result is that they are always swept by the winds, which prevent the desert sand from accumulating over them, and so have preserved the original level of the ground. From their proximity to the surface they are often found disturbed, more often by the agency of jackals than that of man. Contemporaneously with M. de Morgan’s explorations, Prof. Flinders Petrie and Mr. J. Quibell had, in the winter of 1894-5, excavated in the districts of Tukh and Nakada, on the west bank of the Nile opposite Koptos, a series of extensive cemeteries of the primitive type, from which they obtained a large number of antiquities, published in their volume Nagada and Dallas. The plates giving representations of the antiquities found were of the highest interest, but the scientific value of the letter-press is vitiated by the fact that the true historical position of the antiquities was not perceived by their discoverers, who came to the conclusion that these remains were those of a “New Pace” of Libyan invaders. This race, they supposed, had entered Egypt after the close of the flourishing period of the “Old Kingdom” at the end of the VIth Dynasty, and had occupied part of the Nile valley from that time till the period of the Xth Dynasty. This conclusion was proved erroneous by M. de Morgan almost as soon as made, and the French archæologist’s identification of the primitive remains as pre-dynastic was at once generally accepted. It was obvious that a hypothesis of the settlement of a stone-using barbaric race in the midst of Egypt at so late a date as the period immediately preceding the XIIth Dynasty, a race which mixed in no way with the native Egyptians themselves, and left no trace of their influence upon the later Egyptians, was one which demanded greater faith than the simple explanation of M. de Morgan.