A long low, level shore, scarcely rising above the sea, a chain of vaguely defined and ever-shifting lakes and marshes, then the triangular plain beyond, whose apex is thrust thirty leagues into the land--this, the Delta of Egypt, has gradually been acquired from the sea, and is as it were the gift of the Nile. The Mediterranean once reached to the foot of the sandy plateau on which stand the Pyramids, and formed a wide gulf where now stretches plain beyond plain of the Delta. The last undulations of the Arabian hills, from Gebel Mokattam to Gebel Geneffeh, were its boundaries on the east, while a sinuous and shallow channel running between Africa and Asia united the Mediterranean to the Red Sea. Westward, the littoral followed closely the contour of the Libyan plateau; but a long limestone spur broke away from it at about 31 deg. N., and terminated in Cape Abukir. The alluvial deposits first tilled up the depths of the bay, and then, under the influence of the currents which swept along its eastern coasts, accumulated behind that rampart of sand-hills whose remains are still to be seen near Benha. Thus was formed a miniature Delta, whose structure pretty accurately corresponded with that of the great Delta of to-day. Here the Nile divided into three divergent streams, roughly coinciding with the southern courses of the Rosetta and Damietta branches, and with the modern canal of Abu Meneggeh. The ceaseless accumulation of mud brought down by the river soon overpassed the first limits, and steadily encroached upon the sea until it was carried beyond the shelter furnished by Cape Abukir. Thence it was gathered into the great littoral current flowing from Africa to Asia, and formed an incurvated coast-line ending in the headland of Casios, on the Syrian frontier. From that time Egypt made no further increase towards the north, and her coast remains practically such as it was thousands of years ago:[*] the interior alone has suffered change, having been dried up, hardened, and gradually raised. Its inhabitants thought they could measure the exact length of time in which this work of creation had been accomplished. According to the Egyptians, Menes, the first of their mortal kings, had found, so they said, the valley under water. The sea came in almost as far as the Fayum, and, excepting the province of Thebes, the whole country was a pestilential swamp. Hence, the necessary period for the physical formation of Egypt would cover some centuries after Menes. This is no longer considered a sufficient length of time, and some modern geologists declare that the Nile must have worked at the formation of its own estuary for at least seventy-four thousand years.[**]