scrap of it showed in the ore as visible gold or copper? Did they at the same time develop engineering know-how that enabled them to remove 250,000,000 tons of ore from rock at depth - remember they had never demonstrated these talents before - and did they abruptly forget or cease to use them for another thousand years?'
'Well, the Arab traders - they may have--' Louren began but Sally rode over him without a check.
'Why did they mine it at such risk and expenditure of energy? Gold has no value to the Bantu - cattle are their standard of wealth. Where did they learn how to dress and use rock for building? The Bantu had never done it before. Suddenly the art was fully fledged and highly skilled and then instead of becoming more refined, the art deteriorated rapidly and then died out.'
With assumed reluctance Louren retreated steadily before her onslaughts, but he made his final stand when my own theory of incursion from the west instead of the east came under discussion. Louren had read the views and arguments of all my many detractors and critics and he repeated them now.
The accepted theory was that the point of entry was from the Sofala coast, or the mouth of the Zambezi. I had put forward the theory, based on the evidence of early texts and extensive excavations of my own, that a Mediterranean people left that sea through the Pillars of Hercules, and voyaged steadily down the western coast of Africa, probably establishing trading stations on the Gold, Ivory and Nigerian coasts, until their southward explorations led them into an unpeopled vacuum. I guessed at a river mouth long since dried and silted or altered in its course and depth in the present day. A river that drained what then would have been the huge lakes of Makarikari, Ngami, and others long since disappeared, shrivelled by the progressive desiccation of southern Africa. They entered the river, possibly the Cunene or the Orange, journeyed up it to the source, and from there sent their metallurgists overland to discover the ancient mines of Manica - and who knows but they discovered the diamonds in the gravel of the lakes and rivers, and certainly they would have hunted the vast herds of elephant that roamed the land. Sufficient wealth to justify the establishment of a city, a great walled fortress and trading station. Where would they site this city? Clearly at the limit of water-borne travel. On the shores of the farthest lake. Makarikari, perhaps? Or the lake that overflowed the present boundaries of the great salt pan.
Sally and Louren argued with increasing acrimony and bitterness. Sally called him 'an impossible man', and he countered with 'madam know-it-all'. Then suddenly Louren capitulated and the next minute all three of us were joyously anticipating the discovery of the lost city of Makarikari.
'The lake would have spread at least fifty miles beyond the boundaries of the present pan,' Louren pointed out. 'Only a hundred years ago Burchell describes Lake Ngami as an inland sea, and nowadays it's a puddle you can jump across without straining yourself. It's altogether probable that the ancient lake extended to the foot of the hills on which our ruins are placed. We have plenty of evidence of the gradual desiccation and drying up of southern Africa, read Cornwallis Harris' description of the forests and rivers which no longer exist.'
'Ben.' Sally grabbed my arm with excitement. 'The crescent-shape of the city, do you remember me puzzling on it? It could be the shape of the ancient harbour with the two following the shoreline!'
'God,' Louren whispered. 'I can hardly wait for tomorrow.'
It was after midnight, and the whisky bottles had taken a terrible beating before Louren and Sally went off to their tents. I knew I could not sleep so I left the camp, passing the fire around which lay the blanket-cocooned bodies of our servants, and I walked out onto the surface of the pan. The stars lit the salt a ghastly grey, and it crunched crisply with each