South of the region to which we have given the name of Palestine, intervening between it and Egypt, lay a tract, to which it is difficult to assign any political designation. Herodotus regarded it as a portion of Arabia, which he carried across the valley of the Arabah and made abut on the Mediterranean. To the Jews it was “the land of the south”--the special country of the Amalekites. By Strabo’s time it had come to be known as Idumsea, or the Edomite country; and under this appellation it will perhaps be most convenient to describe it here. Idumasa, then, was the tract south and south-west of Palestine from about lat. 31° 10’. It reached westward to the borders of Egypt, which were at this time marked by the Wady-el-Arish, southward to the range of Sinai and the Elanitic Gulf, and eastward to the Great Desert. Its chief town was Petra, in the mountains east of the Arabah valley. The character of the tract is for the most part a hard gravelly and rocky desert; but occasionally there is good herbage, and soil that admits of cultivation; brilliant flowers and luxuriantly growing shrubs bedeck the glens and terraces of the Petra range; and most of the tract produces plants and bushes on which camels, goats, and even sheep will browse, while occasional palm groves furnish a grateful shade and an important fruit. The tract divides itself into four regions--first, a region of sand, low and flat, along the Mediterranean, the Shephelah without its fertility; next, a region of hard gravelly plain intersected by limestone ridges, and raised considerably above the sea level, the Desert of El-Tin, or of “the Wanderings;” then the long, broad, low valley of the Arabah, which rises gradually from the Dead Sea to an imperceptible watershed, and then falls gently to the head of the Gulf of Akabah, a region of hard sand thickly dotted with bushes, and intersected by numerous torrent courses; finally a long narrow region of mountains and hills parallel with the Arabah, constituting Idumsea Proper, or the original Edom, which, though rocky and rugged, is full of fertile glens, ornamented with trees and shrubs, and in places cultivated in terraces. In shape the tract was a rude square or oblong, with its sides nearly facing the four cardinal points, its length from the Mediterranean to the Gulf of Akabah being 130 miles, and its width from the Wady-el-Arish to the eastern side of the Petra mountains 120 miles. The area is thus about 1560 square miles. Beyond the Wady-el-Arish was Egypt, stretching from the Mediterranean southwards a distance of nearly eight degrees, or more than 550 miles. As this country was not, however, so much a part of the Babylonian Empire as a dependency lying upon its borders, it will not be necessary to describe it in this place.