The cost of art objects in general and those of black art in particular, has increased during the last thirty years at a dizzying rate. Following the law of supply and demand, quality pieces have reached prices today that were unimaginable only a few years ago. For example, in 1966 at the Helena Rubinstein auction, for which I was engaged as the expert, acquired a Fang head for $22,000. This had been purchased for about $9,500 before the war by the Princess Gourielli. Several weeks later, a Swiss collector offered me $35,000. Today (1974) I have offers varying between $80,000 and $100,000 for it.