Abstract
Recent archaeological excavations have revealed two distinct pottery traditions in the Birim Valley, southern Ghana. These have been classified as the ‘Earthworks Ware’ and the ‘Atwea Ware’. In certain archaeological contexts, the ‘Atwea Ware’ succeeds ‘Earthworks Ware’, and it also continues into present-day ethnography. The discontinuity between these two pottery traditions suggests a change in population. It is therefore suggested here that the population of ‘Earthworks Ware’ makers was one of the early victims of the Atlantic slave trade from about the mid-sixteenth century and that they were replaced in this area of the Birim Valley around a.d. 1700 by the Atweafo, a Twi-speaking group, whose descendants live there to this day. From the eighteenth century until close to the end of the nineteenth century a number of Denkyira, Asini and Asante migrants also moved into this valley. During this time the militarily weak Atweafo lived at the mercy of four major powers – the Asante, Akim Abuakwa, Akim Kotoku and the Akwamu. However, the Atweafo found means to survive under what seems to have been a highly volatile political environment by shifting their loyalty amongst these powers as situations dictated.

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