This paper sets forth the methodology employed to establish and refine a dating system based on genealogies collected during field research in two areas of Africa, Agago county in Eastern Acholi and Awe district in the Benue Valley. Interview sessions with the elders normally lasted from two to four hours and many topics might be, and usually were, discussed in the course of a single interview. To demonstrate the progression of questioning relative to multiple themes would be beyond the space available or the stamina of readers. It is proposed rather to isolate the problem of chronology and show how, throughout the fieldwork period, achieving accuracy should be a major preoccupation and of greater or lesser concern in every interview. The regnal list is not collected once or twice or thrice. It forms a problem which continuously protrudes into the interviews, more so in the early stages of fieldwork, less so in the later, but seldom totally ignored.
When historical research focused on large kingdoms such as Bunyoro or Oyo, a vague and extremely relative chronology was adequate for many research objectives. One consequence of this type of research was a precolonial history of modern African states fashioned from a series of chapters, each one concentrating on spearate tribal traditions. The impression created was of isolated groups whose interaction, except for some outstanding military conflicts, awaited the coming of Arabs and Europeans. Since these aliens brought dates, integrated regional histories were forced to await their coming.