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THE NORTHWARD EXPANSION                             385
diamonds: one a metal with an unlimited market, the other at that time still primarily regarded as a luxury product, confined, so far as the major sources of production are concerned, to Africa south of the Sahara and with a highly centralized marketing organization.
He was now to concern himself also with some major base metals— copper, lead and zinc—widely distributed internationally, subject, especially as regards copper, to very wide swings of demand and therefore of prices, and all of them (again especially copper) having come under the control of powerful groups, at that time largely American, backed by great financial resources and dominated by force­ful individuals. And since the area in which these metals were to be exploited was still, in the twenties of this century, primitive in the extreme, he was called upon, in the course of development, not only to deal with problems of geology and of mining and metallurgical technique, with organizational and financial requirements of a very serious kind, but he also encountered the problem of labour—both white and black—in a setting which resembled the South Africa of an earlier age rather than of the then present.
♦ II ♦
Ernest Oppenheimer himself has recorded, in the memorandum (already referred to) which he prepared for the use of his banking friends in the City of London, the immediate reason for taking an interest in the affairs of Northern Rhodesia:
... The corporation's original incursion into Northern Rhodesian mining was really the result of our diamond activities. After negotiations with the Belgian and Angola diamond companies, through the intermediary of Sir Edmund Davis, for the purchase of their diamonds had been successfully completed, Sir Edmund Davis asked me as a favour to assist with Bwana (M'Kubwa) finance and I agreed to participate in a small way on condition that we were appointed consulting engineers. We looked upon the deal as a share transaction; it was liquidated fairly promptly, actually with the assistance of Sir Edmund.
Later on, after negotiations with Mr. Chester Beatty with reference to West African diamonds had brought us into closer relations with him, he asked the corporation to help in Rhodesian Congo Border Concession finance, which it did, again stipulating for the consulting engineership, which was readily granted. It must be recorded that at this time Bwana