In Africa I have never been south of the Aswan Dam or the northern foothills of the Atlas Mountains, and except in the context of work as a public servant in the 1960s, I have done little or no research on Africa south of the Sahara. I agreed to deliver this talk because my interest in Africa was heightened in 1959-1960 by a heartwarming correspondence with a young African economist, D. K. Chisiza, who deserves remembrance.