The story of the Nile valley from the dawn of its traceable history until the time of Alexander the Great is not very dissimilar from that of Babylonia; but while Babylonia lay open on every side to invasion, Egypt was protected by desert to the west and by desert and sea to the east, while to the south she had only negro peoples. Consequently her history is less broken by the invasions of strange races than is the history of Assyria and Babylon, and until towards the eighth century B.C., when she fell under an Ethiopian dynasty, whenever a conqueror did come into her story, he came in from Asia by way of the Isthmus of Suez. [Illustration: Iron Weapons] The Stone Age remains in Egypt are of very uncertain date; there are Palæolithic and then Neolithic remains. It is not certain whether the Neolithic pastoral people who left those remains were the direct ancestors of the later Egyptians. In many respects they differed entirely from their successors. They buried their dead, but before they buried them they cut up the bodies and apparently ate portions of the flesh. They seem to have done this out of a feeling of reverence for the departed; the dead were “eaten with honour” according to the phrase of Mr. Flinders Petrie. It may have been that the survivors hoped to retain thereby some vestige of the strength and virtue that had died. Traces of similar savage customs have been found in the long barrows that were scattered over western Europe before the spreading of the Aryan peoples, and they have pervaded negro Africa, where they are only dying out at the present time. [Illustration: Early figure of the Egyptian hippopotamus goddess.] About 5000 B.C., or earlier, the traces of these primitive peoples cease, and the true Egyptians appear on the scene. The former people were hut builders and at a comparatively low stage of Neolithic culture, the latter were already a civilized Neolithic people; they used brick and wood buildings instead of their predecessors’ hovels, and they were working stone. Very soon they passed into the Bronze Age. They possessed a system of picture writing almost as developed as the contemporary writing of the Sumerians, but quite different in character. Possibly there was an irruption from southern Arabia by way of Aden, of a fresh people, who came into upper Egypt and descended slowly towards the delta of the Nile. Dr. Wallis Budge writes of them as “conquerors from the East.” But their gods and their ways, like their picture writing, were very different indeed from the Sumerian. One of the earliest known figures of a deity is that of a hippopotamus goddess, and so very distinctively African.[113] The clay of the Nile is not so fine and plastic as the Sumerian clay, and the Egyptians made no use of it for writing. But they early resorted to strips of the papyrus reed fastened together, from whose name comes our word “paper.”