The Khoonazaberni or river of Khisht rises near the ruins of Shapur, at a short distance from Kazerun, on the route between Bushire and Shiraz, and flows in a broad valley between lofty mountains towards the south-west, entering the Persian Gulf by three mouths, the chief of which is at Rohilla, twenty miles north of Bushire, where the stream has a breadth of sixty yards, and a depth of about four feet. Above Khisht the river is already thirty yards wide. Its chief tributary is the Dalaki stream, which enters it from the east, nearly in long. 51°. The entire course of the Khisht river may be about 95 or 100 miles. Its water is brackish except near the source. The principal lakes are the Lake of Neyriz and the Deriah-i-Nemek. The Deriah-i-Nemek is a small basin distant about ten miles from Shiraz, which receives the waters of the streams that supply that town. It has a length of about fifteen and a breadth of about three or three and a half miles. The lake of Neyriz or Kheir is of far larger size, being from fifty to sixty miles long and from three to six broad, though in the summer season it is almost entirely dried up. Salt is then obtained from the lake in large quantities, and forms an important feature in the commerce of the district. Smaller lakes, also salt or brackish, exist in other parts of the country, as Lake Famur, near Kazerun, which is about six miles in length, and from half a mile to a mile across. The most remarkable feature of the country consists in the extraordinary gorges which pierce the great mountain-chain, and render possible the establishment of routes across that tremendous barrier. Scarped rocks rise almost perpendicularly on either side of the mountain-streams, which descend rapidly with frequent cascades and falls. Along the slight irregularities of these rocks the roads are carried in zigzags, often crossing the streams from side to side by bridges of a single arch, which are thrown over profound chasms where the waters chafe and roar many hundred feet below.46 [PLATE XXVI.] The roads have for the most part been artificially cut in the sides of the precipices, which rise from the streams sometimes to the height of 2000 feet. In order to cross from the Persian Gulf to the high plateau of Iran, no fewer than three or four of these kotuls, or strange gorge-passes, have to be traversed successively. Thus the country towards the edge of the plateau is peculiarly safe from attack, being defended on the north and east by vast deserts, and on the south by a mountain-barrier of unusual strength and difficulty. [Illustration: PLATE XXVI.]