Opening ParagraphThis article represents some of the results of three field research studies of urbanization in the Sudan. The research has focussed on two urban communities in the Khartoum area, those known as Tuti Island1 and Burn al Manas. The first study was conducted as doctoral research in 1970–72; a brief re-study took place in 1975, and most recently research was conducted in 1979–80. This ten-year period was a time during which major economic and demographic change occurred in the urban Sudan. A recent study in the capital city area of the Sudan by urban planners has concluded that ‘any sociologist or social anthropologist who approaches the problems of urbanization in Africa today has the privilege of witnessing a social transformation on a grand scale’ (MEFIT, 1974: I). I have already reported on some aspects of change in class structure, marriage, kinship and the family (Lobban, 1971, 1975, 1979), but these earlier articles have relied chiefly on earlier fieldwork. Among studies of culture change in general, and urbanization in particular, it is unfortunately uncommon to have data from replicated, longitudinal studies. In this respect this article may make an especially useful contribution.