Persia Proper seems to have corresponded nearly to that province of the modern Iran, which still bears the ancient name slightly modified, being called Farsistan or Fars. The chief important difference between the two is, that whereas in modern times the tract called Herman is regarded as a distinct and separate region, Carmania anciently was included within the limits of Persia. Persia Proper lay upon the gulf to which it has given name, extending from the mouth of the Tab (Oroatis) to the point where the gulf joins the Indian Ocean. It was bounded on the west by Susiana, on the north by Media Magna, on the east by Mycia, and on the south by the sea. Its length seems to have been about 450, and its average width about 250 miles. It thus contained an area of rather more than 100,000 square miles.
In modern times it is customary to divide the province of Fars into the _ghermsir_, or, “warm district,” and the _serdsir_, or “cold region”--and the physical character of the country must have made such a division thoroughly appropriate at every period. The “warm district” is a tract of sandy plain, often impregnated with salt, which extends between the mountains and the sea the whole length of the province, being a continuation of the flat region of Susiana, but falling very much short of that region in all the qualities which constitute physical excellence. The soil is poor, consisting of alternate sand and clay--it is ill-watered, the entire tract possessing scarcely a single stream worthy of the name of river--and, lying only just without the northern Tropic, the district is by its very situation among the hottest of western Asia. It forms, however, no very large portion of the ancient Persia, being in general a mere strip of land, from ten to fifty miles wide, and thus not constituting more than an eighth part of the territory in question.
The remaining seven eighths belong to the serdsir, or “cold region.” The mountain-range which under various names skirts on the east the Mesopotamian lowland, separating off that depressed and generally fertile region from the bare high plateau of Iran, and running continuously in a direction parallel to the course of the Mesopotamian streams--i.e. from the north-west to the south-east--changes its course as it approaches the sea, sweeping gradually round between long. 50° and 55°, and becoming parallel to the coast-line, while at the same time it broadens out, till it covers a space of nearly three degrees, or above two hundred miles. Along the high tract thus created lay the bulk of the ancient Persia, consisting of alternate mountain, plain, and narrow valley, curiously intermixed, and as yet very incompletely mapped. This region is of varied character. In places richly, fertile, picturesque, and romantic almost beyond imagination, with lovely wooded dells, green mountain-sides, and broad plains suited for the production of almost any crops, it has yet on the whole a predominant character of sterility and barrenness, especially towards its more northern and eastern portions. The supply of water is everywhere scanty. Scarcely any of the streams are strong enough to reach the sea. After short courses they are either absorbed by the sand or end in small salt lakes, from which the superfluous water is evaporated. Much of the country is absolutely without streams, and would be uninhabitable were it not for the _kanats_, or _karizes_, subterranean channels of spring-water, described at length in a former volume.