It remains to notice briefly those provinces of the south-west which had not been included within any of the preceding monarchies, and which are therefore as yet undescribed in these volumes. These provinces are the African, and may be best considered under the three heads of Egypt, Libya, and the Cyrenaica.
Egypt, if we include under the name not merely the Nile valley and the Delta, but the entire tract interposed between the Libyan Desert on the one side and the Arabian Gulf or Red Sea on the other, is a country of nearly the size of Italy. It measures 520 miles from Elephantine to the Mediterranean, and has an average width of 150 or 160 miles. It must thus contain an area of about 80,000 square miles. Of this space, however, at least three fourths is valueless, consisting of bare rocky mountain or dry sandy plain. It is only along the course of the narrow valley in which the Nile flows from the Cataracts to beyond Cairo, in the tract known as the Faioum, and in the broad region of the Delta, that cultivation is possible. Even in the Delta itself there are large spaces which are arid, and others which are permanent marshes, so that considerable portions of its surface are unfitted for husbandry. But if the quantity of cultivable land is thus limited in Egypt, the quality is so excellent, in consequence of the alluvial character of the soil, that the country was always in ancient times a sort of granary of the world. The noble river, bringing annually a fresh deposit of the richest soil, and furnishing a supply of water, which is sufficient, if carefully husbanded, to produce a succession of luxuriant crops throughout the year, makes Egypt—what it is even at the present day—one of the most fertile portions of the earth’s surface—a land of varied products, all excellent—but especially a land of corn, to which the principal nations of the world looked for their supplies, either regularly, or at any rate in times of difficulty.
West of Egypt was a dry and sandy tract, dotted with oases, but otherwise only habitable along the shore, which in the time of the Persian Empire was occupied by a number of wild tribes who were mostly in the lowest condition to which savage man is capable of sinking. The geographical extent of this tract was large, exceeding considerably that of Egypt; but its value was slight. Naturally, it produced nothing but dates and hides. The inhumanity of the inhabitants made it, however, further productive of a commodity, which, until the world is christianized, will probably always be regarded as one of high value—the commodity of negro slaves, which were procured in the Sahara by slave-hunts, and perhaps by purchase in Nigritia.
Still further to the west, and forming the boundary of the Empire in this direction, lay the district of the Cyrenaica, a tract of singular fertility and beauty. Between Benghazi, in east longitude 20°, and the Ras al Tynn (long. 23° 15’), there rises above the level of the adjacent regions an extensive table land, which, attracting the vapors that float over the Mediterranean, condenses them, and so abounds with springs and rills. A general freshness and greenness, with rich vegetation in places, is the consequence. Olives, figs, carobs, junipers, oleanders, cypresses, cedars, myrtles, arbutus-trees, cover the flanks of the plateau and the hollows which break its surface, while the remainder is suitable alike for the cultivation of cereals and for pasturage. Nature has also made the region a special gift in the laserpitium or silphium, which was regarded by the ancients as at once a delicacy and a plant of great medicinal power, and which added largely to the value of the country.
Such was the geographical extent of the Persian Empire, and such were the chief provinces which it contained besides those previously comprised in the empires of Media or Babylon. Territorially, the great mass of the Empire lay towards the east, between long. 50° and 75°, or between the Zagros range and the Indian Desert. But its most important provinces were the western ones. East of Persepolis, the only regions of much value were the valleys of the Indus and the Oxus. Westward lay Susiana, Babylonia, Assyria, Media, Armenia, Iberia, Cappadocia, Asia Minor, Cyprus, Syria, Palestine, Egypt, the Cyrenaica—all countries of great, or at least considerable, productiveness. The two richest grain tracts of the ancient world, the best pasture regions, the districts which produced the most valuable horses, the most abundant of known gold-fields, were included within the limits of the Empire, which may be looked upon as self-sufficing, containing within it all that man in those days required, not only for his necessities, but even for his most cherished luxuries.
The productiveness of the Empire was the natural result of its possessing so many and such large rivers. Six streams of the first class, having courses exceeding a thousand miles in length, helped to fertilize the lands which owned the sway of the Great King. These were the Nile, the Indus, the Euphrates, the Jaxartes, the Oxus, and the Tigris. Two of the six have been already described in these volumes, and therefore will not need to detain us here; but a few words must be said with respect to each of the remaining four, if our sketch of the geography of the Empire is to make any approach to completeness.
The Nile was only in the latter part of its course a Persian stream. Flowing, as we now know that it does, from within a short distance of the equator, it had accomplished more than three fourths of its course before it entered a Persian province. It ran, however, through Persian territory a distance of about six hundred miles, and conferred on the tract through which it passed immeasurable benefits. The Greeks sometimes maintained that “Egypt was the gift of the river;” and, though this was very far from being a correct statement in the sense intended, there is a meaning of the words in which we may accept them as expressing a fact. Egypt is only what she is through her river. The Nile gives her all that makes her valuable. This broad, ample, and unfailing stream not only by its annual inundation enriches the soil and prepares it for tillage in a manner that renders only the lightest further labor necessary, but serves as a reservoir from which inexhaustible supplies of the precious fluid can be obtained throughout the whole of the year. The water, which rises towards the end of June, begins to subside early in October, and for half the year—from December till June—Egypt is only cultivable through irrigation. She produces, however, during this period, excellent crops—even at the present day, when there are few canals—from the facility with which water is obtained, by means of a very simple engine, out of the channel of the Nile. This unfailing supply enabled the cultivator to obtain a second, a third, and even sometimes a fourth crop from the same land within the space of a year.
The course of the Nile from Elephantine, where it entered Egypt, to Cercasorus, near Heliopolis, where it bifurcated, was in general north, with, however, a certain tendency westward. It entered Egypt nearly in long. 33°, and at Neapolis (more than two degrees further north) it was still within 15° of the same meridian; then, however, it took a westerly bend, crossed the 32nd and 31st meridians, and in lat. 28° 23 reached west as far as long. 30° 43’. After this it returned a little eastward, recrossed the 31st meridian, and having reached long. 31° 22’ near Aphroditopolis (lat.29° 25), it proceeded almost due north to Cercasorus in lat. 30° 7’. The course of the river up to this point was, from its entry into the country, about 540 miles. At Cercasorus the Delta began. The river threw out two branches, which flowed respectively to the north-east and the north-west, while between them was a third channel, a continuation of the previous course of the stream, which pierced the Delta through its centre, flowing almost due north. Lower down, further branch channels were thrown out, some natural, some artificial, and the triangular tract between the two outer arms of the river was intersected by at least five, and (in later times) by fourteen large streams. The right and left arms appear to have been of about equal in length, and may be estimated at 150 or 160 miles; the central arm had a shorter course, not exceeding