The whole country must have suffered greatly. The system of irrigation set in order by Amenemhet III. required both national supervision and national funds for its maintenance. As neither could have been forthcoming, the food production must have been materially diminished. Engaged in civil war, Egypt soon fell a prey to foreign invaders. For hundreds of years it had been not unusual for Syrian bands to ask permission to settle within Egyptian borders. In the tomb of a provincial governor of Upper Egypt has been found a painting which portrays a company of seventeen Bedouins bringing presents to the nobleman and asking that they be allowed to locate in his dominion. In Genesis we read concerning Abram: "And Abram journeyed, going still toward the south. And there was a famine in the land of Canaan; and Abram went down into Egypt to sojourn there; for the famine was grievous in the land." Since Abram was rich in cattle and in gold, he undoubtedly brought many of his family and followers to dwell with him in the land of plenty. Similar incidents were common. If the rainfall was short in Canaan, in the territory of the Hittites or even in Arabia, Egypt was ever regarded as a last resort. The Nile never failed to supply water for the flocks; here, too, it was customary to store grain in royal store-cities, in order that in time of need Egypt could sell advantageously to her neighbors. In a pastoral age, such favorable conditions as these were highly prized. The Pharaohs diligently fortified their frontiers, and it must not be supposed that in times of peace foreigners were allowed to come at will into the land. There were, on the contrary, officers stationed along the boundaries to apprehend any who wished to enter, to receive their requests and forward them to the governor of the nome. Until he was heard from, strangers were detained on the border. It seems to have been usual, however, to admit such petitioners unless it was thought that they might become a menace to the state. It naturally came about, therefore, that the tribes on the east looked with envious eyes upon the rich valley of the Nile, and when Egypt was disrupted, her resources and soldiers no longer at the command of one ruler but divided among several contending nobles--each of whom valued his personal interests above those of his country--while anarchy and disorder infested the coveted land, an overwhelming host of Semitic hordes poured into the Delta, spreading thence into the valley. Before them Egypt was helpless.