Some authors are of opinion that the ancient Egyptians did not engage in navigation and commerce till the era of the Ptolemies; but this is undoubtedly a mistake, since traces of their commercial intercommunication with other nations may be found at a very early period of history. It is probable, however, that for a long time they themselves did not engage in commerce, but were merely visited by traders from foreign countries; for at this era it was a maxim with them, never to leave their own country. The low opinion they entertained of commerce may be gathered from Herodotus, who mentions, that the men disdained to meddle with it, but left it entirely to the women. The earliest account we possess of traffic with Egypt, is to be found in the Old Testament, where we are informed, that the Midianites and Ismaelites traded thither as early as the time of Jacob. Sesostris, who is generally supposed to have lived about 1650 years before Christ, is by most writers described as the king who first overcame the dislike of the Egyptians to the sea. That this monarch engaged in many enterprises both by sea and land, not only for conquest, but also for purposes of trade and colonization, there can be no doubt; though it is impossible either to trace his various routes, or to estimate the extent of his conquests or discoveries. The concurrent testimony of Diodorus and Herodotus assign to him a large fleet in the Red Sea; and according to other historians, he had also a fleet in the Mediterranean. In order the more effectually to banish the prejudices of the Egyptians against the sea, he is said to have instituted a marine class among his subjects. By these measures he seems to have acquired the sovereignty and the commerce of the greater part of the shores of the Red Sea; along which his ships continued their route, till, according to Herodotus, they were prevented from advancing by shoals and places difficult to navigate; a description which aptly applies to the navigation of this sea.