The other was in Africa in 1980. Between three and four thousand primitive tribesmen—men, women, and children—vanished from a relatively remote area of central Africa. Their villages were found empty; they had abandoned all their possessions, including large stores of food. They seemed to have just run off into the bush. The only signs of violence were a few broken pieces of pottery. Of course, mass disappearances in that part of the world are dismayingly more frequent than they once
