"It is difficult to imagine that Egypt should have obtained it from Europe where the oldest find (in Hallstadt) cannot be of an earlier period than 800 B.C., or from Asia, where iron is not known before 1000 B.C., and where, in the times of Ashur Nazir Pal, it was still used concurrently with bronze, while iron beads have been only recently discovered by Messrs. G.A. Wainwright and Bushe Fox in a predynastic grave, and where a piece of this metal, possibly a tool, was found in the masonry of the great pyramid."[45] The Negro is a born trader. Lenz says, "our sharpest European merchants, even Jews and Armenians, can learn much of the cunning and trade of the Negroes." We know that the trade between Central Africa and Egypt was in the hands of Negroes for thousands of years, and in early days the cities of the Sudan and North Africa grew rich through Negro trade. Leo Africanus, writing of Timbuktu in the sixteenth century, said, "It is a wonder to see what plentie of Merchandize is daily brought hither and how costly and sumptuous all things be.... Here are many shops of artificers and merchants and especially of such as weave linnen and cloth." Long before cotton weaving was a British industry, West Africa and the Sudan were supplying a large part of the world with cotton cloth. Even to-day cities like Kuka on the west shore of Lake Chad and Sokota are manufacturing centers where cotton is spun and woven, skins tanned, implements and iron ornaments made. "Travelers," says Buecher, "have often observed this tribal or local development of industrial technique. 'The native villages,' relates a Belgian observer of the Lower Congo, 'are often situated in groups. Their activities are based upon reciprocality, and they are to a certain extent the complements of one another. Each group has its more or less strongly defined specialty. One carries on fishing; another produces palm wine; a third devotes itself to trade and is broker for the others, supplying the community with all products from outside; another has reserved to itself work in iron and copper, making weapons for war and hunting, various utensils, etc. None may, however, pass beyond the sphere of its own specialty without exposing itself to the risk of being universally proscribed.'"