Isaac was not a wanderer like his father. Lahai-roi in the desert, "the valley of Gerar," Beer-sheba and Hebron, were the places round which his life revolved, and they were all close to one another. There is no trace of his presence in the north of Palestine, and when the prophet Amos (vii. 16) makes Isaac synonymous with the northern kingdom of Israel, there can be no geographical reference in his words. Isaac died eventually at Hebron, and was buried in the family tomb of Machpelah. But long before this happened Jacob had fled from the well-deserved wrath of his brother to his uncle Laban at Harran. On his way he had slept on the rocky ridge of Bethel, and had beheld in vision the angels of God ascending and descending the steps of a staircase that led to heaven. The nature of the ground itself must have suggested the dream. The limestone rock is fissured into steplike terraces, which seem formed of blocks of stone piled one upon the other, and rising upwards like a gigantic staircase towards the sky. On the hill that towers above the ruins of Beth-el, we may still fancy that we see before us the "ladder" of Jacob. But the vision was more than a mere dream. God appeared in it to the patriarch, and repeated to him the promise that had been made to his fathers. Through Jacob, the younger of the twins, the true line of Abraham was to be carried on. When he awoke in the morning the fugitive recognized the real character of his dream. He took, accordingly, the stone that had served him for a pillow, and setting it up as an altar, poured oil upon it, and so made it a Beth-el, or "House of God," Henceforward it was a consecrated altar, a holy memorial of the God whose divinity had been mysteriously imparted to it. The Semitic world was full of such Beth-els, or consecrated stones. They are referred to in the literature of ancient Babylonia, and an English traveller, Mr. Doughty, has found them still existing near the Tema of the Old Testament in Northern Arabia. In Phoenicia we are told that they abounded. The solitary rock in the desert or on the mountain-side seemed to the primitive Semite the dwelling-place of Deity; it rose up awe-striking and impressive in its solitary grandeur and venerable antiquity; it was a shelter to him from the heat of the sun, and a protection from the perils of the night. When his worship and adoration came in time to be transferred from the stone itself to the divinity it had begun to symbolize, it became an altar on which the libation of oil or wine might be poured out to the gods, and on the seals of Syria and the sculptured slabs of Assyria we accordingly find it transformed into a portable altar, and merged in the cone-like symbol of the goddess Ashêrah. The stone which had itself been a Beth-el wherein the Deity had his home, passed by degrees into the altar of the god whose actual dwelling-place was in heaven.