New field material should give an opportunity for reappraising old research. Thus Father de Sousberghe's latest report on the Pende (1963) stimulates a radical revision of assumptions about Central African ethnography. Is there a recognizable type of kinship organization which we can call ‘Central African’? The question was first raised by Gluckman in his introduction to The Lamba Village before any intensive field-work had been reported. At that stage his answer was that the typical Central African social system was characterized by lack of corporate lineages such as are found among the southern Bantu. These were the early days of post-war anthropology, and since he was using a negative criterion, he denned the sense in which he used ‘lineage’ as a genealogical structure whose members shared corporate rights and responsibilities. Before the ink was dry, however, Clyde Mitchell was sending in the first reports on the Yao, who are culturally much akin to the Maravi peoples, Nyanja and Cewa, among whom they live. According to Mitchell, the Yao were organized in distinct corporate matrilineal lineages. Gluckman did not tear up his introduction and write a new one. In an addendum he hoped that the unexpected discovery of corporate descent groups among the Yao would stimulate further inquiry.