TERRA COTTA • FREE TRANSLATOR.ORG • Definition of Terra cotta

... influence and existed for many centuries. In West Africa there was a flourishing group of Negro city states, the most famous of these being the Yoruban group. Recent discoveries of Frobenius in these parts of the continent show that the people reached a high stage of development in the terra cotta, bronze, glass, weaving, and iron industry. In the regions about the Great Lakes, inhabited largely by the Bantu, are found many worked over gold and silver mines, old irrigation systems, remains of hundreds of groups of stone buildings ...

— The Journal of Negro History, Vol. I. Jan. 1916 • Various