Having thus given a sketch of the geographical knowledge contained the Periplus, we shall next attend to the commercial information which it conveys. As this work is divided into two distinct parts, the first comprising the coast of the Red Sea, and of Africa, from Myos Hormos on the former, to Rhapta in the latter: and the second part, beginning at the same place, and including the whole coast of Arabia, both that which lies on the Red Sea, and that which lies on the Ocean, and then stretching from the Gulf of Persia to Guzerat, describing the coast of Malabar, as far as Ceylon, we shall, in our abstract of the commercial intelligence it contains, enumerate the principal imports and exports of the most frequented marts in Africa, (including the Red Sea,) Arabia, and India. I. The Red Sea and Africa. Myos Hormos is described as the first port of Egypt on the Red Sea; as it lies in twenty-seven degrees north latitude, and Rhapta, the boundary of the Periplus to the south, in nearly ten degrees south latitude, the distance between them will be about 2,500 miles. It is to be supposed, that every thing relating to the geography, navigation, and commerce of the Red Sea, from Myos Hormos to Aduli, on the western side, and Moosa, on the eastern side of it, was well known to the merchants of Egypt, as the author of the Periplus gives no circumstantial account of any port, till he arrives at these places. It appears, also, that till the ships arrived at these places, they kept the mid-channel of the Red Sea, and, consequently, there was no occasion, or indeed, opportunity of describing the intermediate ports. We have already mentioned, that Myos Hormos was fixed on by Ptolemy Philadelphus, in preference to Arsinoe, because the navigation of the western part of the Red Sea, on which the latter was placed, was intricate and tedious. Berenice was afterwards selected, as being still lower down: but it is worthy of remark, that neither Berenice, nor Ptolemais Theron, another port of the Ptolemies, were harbours, but merely roadsteads, though from our author's description, there were an almost infinite number of safe harbours, creeks, bays, &c. in every part of the Red Sea.