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long and narrow, which, by the contrast that they form with the surrounding desolation, seem to the traveler to possess the verdure and beauty of Paradise. There is a line of these oases extending along this westerly depression, and some of them are of considerable extent. The oasis of Siweh, on which stood the far-famed temple of Jupiter Ammon, was many miles in extent, and was said to have contained in ancient times a population of eight thousand souls. Thus, while the most easterly of the three valleys which we have named was sunk so low as to admit the ocean to flow freely into it, the most westerly was so slightly depressed that it gained only a circumscribed and limited fertility through the springs, which, in the lowest portions of it, oozed from the ground. The third valley—the central one—remains now to be described.

      The reader will observe, by referring once more to the map, that south of the great rainless region of which we are speaking, there lie groups and ranges of mountains in Abyssinia, called the Mountains of the Moon. These mountains are near the equator, and the relation which they sustain to the surrounding seas, and to currents of wind which blow in that quarter of the world, is such, that they bring down from the atmosphere, especially in certain seasons of the year, vast and continual torrents of rain. The water which thus falls drenches the mountain sides and deluges the valleys. There is a great portion of it which can not flow to the southward or eastward toward the sea, as the whole country consists, in those directions, of continuous tracts of elevated land. The rush of water thus turns to the northward, and, pressing on across the desert through the great central valley which we have referred to above, it finds an outlet, at last, in the Mediterranean, at a point two thousand miles distant from the place where the immense condenser drew it from the skies. The river thus created is the Nile. It is formed, in a word, by the surplus waters of a district inundated with rains, in their progress across a rainless desert, seeking the sea.

      If the surplus of water upon the Abyssinian mountains had been constant and uniform, the stream, in its passage across the desert, would have communicated very little fertility to the barren sands which it traversed. The immediate banks of the river would have, perhaps, been fringed with verdure, but the influence of the irrigation would have extended no further than the water itself could have reached, by percolation through the sand. But the flow of the water is not thus uniform and steady. In a certain season of the year the rains are incessant, and they descend with such abundance and profusion as almost to inundate the districts where they fall. Immense torrents stream down the mountain sides; the valleys are deluged; plains turn into morasses, and morasses into lakes. In a word, the country becomes half submerged, and the accumulated mass of waters would rush with great force and violence down the central valley of the desert, which forms their only outlet, if the passage were narrow, and if it made any considerable descent in its course to the sea. It is, however, not narrow, and the descent is very small. The depression in the surface of the desert, through which the water flows, is from five to ten miles wide, and, though it is nearly two thousand miles from the rainy district across the desert to the sea, the country for the whole distance is almost level. There is only sufficient descent, especially for the last thousand miles, to determine a very gentle current to the northward in the waters of the stream.

      Under these circumstances, the immense quantity of water which falls in the rainy district in these inundating tropical showers, expands over the whole valley, and forms for a time an immense lake, extending in length across the whole breadth of the desert. This lake is, of course, from five to ten miles wide, and a thousand miles long. The water in it is shallow and turbid, and it has a gentle current toward the north. The rains, at length, in a great measure cease; but it requires some months for the water to run off and leave the valley dry. As soon as it is gone, there springs up from the whole surface of the ground which has been thus submerged a most rank and luxuriant vegetation.

      This vegetation, now wholly regulated and controlled by the hand of man, must have been, in its original and primeval state, of a very peculiar character. It must have consisted of such plants only as could exist under the condition of having the soil in which they grew laid, for a quarter of the year, wholly under water. This circumstance, probably, prevented the valley of the Nile from having been, like other fertile tracts of land, encumbered, in its native state, with forests. For the same reason, wild beasts could never have haunted it. There were no forests to shelter them, and no refuge or retreat for them but the dry and barren desert, during the period of the annual inundations. This most extraordinary valley seems thus to have been formed and preserved by Nature herself for the special possession of man. She herself seems to have held it in reserve for him from the very morning of creation, refusing admission into it to every plant and every animal that might hinder or disturb his occupancy and control. And if he were to abandon it now for a thousand years, and then return to it once more, he would find it just as he left it, ready for his immediate possession. There would be no wild beasts that he must first expel, and no tangled forests would have sprung up, that his ax must first remove. Nature is the husbandman who keeps this garden of the world in order, and the means and machinery by which she operates are the grand evaporating surfaces of the seas, the beams of the tropical sun, the lofty summits of the Abyssinian mountains, and, as the product and result of all this instrumentality, great periodical inundations of summer rain.

      For these or some other reasons Egypt has been occupied by man from the most remote antiquity. The oldest records of the human race, made three thousand years ago, speak of Egypt as ancient then, when they were written. Not only is Tradition silent, but even Fable herself does not attempt to tell the story of the origin of her population. Here stand the oldest and most enduring monuments that human power has ever been able to raise. It is, however, somewhat humiliating to the pride of the race to reflect that the loftiest and proudest, as well as the most permanent and stable of all the works which man has ever accomplished, are but the incidents and adjuncts of a thin stratum of alluvial fertility, left upon the sands by the subsiding waters of summer showers.

DELTA OF THE NILE

      The sea upon the coast is shallow, and the fertile country formed by the deposits of the river seems to have projected somewhat beyond the line of the coast; although, as the land has not advanced perceptibly for the last eighteen hundred years, it may be somewhat doubtful whether the whole of the apparent protrusion is not due to the natural conformation of the coast, rather than to any changes made by the action of the river.

      The Delta of the Nile is so level itself, and so little raised above the level of the Mediterranean, that the land seems almost a continuation of the same surface with the sea, only, instead of blue waters topped with white-crested waves, we have broad tracts of waving grain, and gentle swells of land crowned with hamlets and villages. In approaching the coast, the navigator has no distant view of all this verdure and beauty. It lies so low that it continues beneath the horizon until the ship is close upon the shore. The first landmarks, in fact, which the seaman makes, are the tops of trees growing apparently out of the water, or the summit of an obelisk, or the capital of a pillar, marking the site of some ancient and dilapidated city.

      The most easterly of the channels by which the waters of the river find their way through the Delta to the sea, is called, as it will be seen marked upon the map, the Pelusiac branch. It forms almost the boundary of the fertile region of the Delta on the eastern side. There was an ancient city named Pelusium near the mouth of it. This was, of course, the first Egyptian city reached by those who arrived by land from the eastward, traveling along the shores of the Mediterranean Sea. On account of its thus marking the eastern frontier of the country, it became a point of great importance, and is often mentioned in the histories of ancient times.

      The westernmost mouth of the Nile, on the other hand, was called the Canopic mouth. The distance along the coast from the Canopic mouth to Pelusium

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