In this paper we present the results of recent laser ablation-inductively coupled plasma-mass spectrometry analysis (LA-ICP-MS) of an assemblage of glass beads from Thabadimasego, an Early Iron Age site in northeast Botswana. Glass beads of Middle East and South Asian origins have been recovered from numerous sites across southern Africa and offer important evidence of trading connections both within southern Africa as well as between the subcontinent and other regions participating in the vast Indian Ocean trade network of the time. Results of the Thabadimasego bead analysis indicate that the site participated in some of the earliest manifestations of this exchange system.
Early Iron Age (EIA) settlements in southern Africa are broadly characterised as small Bantu-speaking agricultural communities that were more or less self-sustaining in terms of subsistence but nevertheless maintained extensive economic and cultural relationships with one another (Mitchell & Whitelaw 2005; Huffman 2007). These relationships involved, to a greater or lesser degree over the centuries, the exchange of both bulk and luxury items. Some of these goods were local products and some, such as glass beads, were acquired via connections to trading networks further abroad across eastern coastal Africa and glass-producing regions across the Indian Ocean (Pwiti 1991; Popelka et al. 2005; Robertshaw et al. 2010). For the southern African EIA, access to and control over the foreign goods exchange network has been cited as a potentially important factor in the development of social complexity (Hall 1987; Huffman 2000). In this paper we discuss the results of recent research which places the involvement of Zhizo-era sites in north-east Botswana in the luxury goods exchange network from an early date (figure 7.1).
During excavations in 2012, approximately 40 glass beads were recovered from Thabadimasego, a small site on the Mosu Escarpment in north-east Botswana dated to the ninth century (figure 7.2). An additional handful was recovered from a test unit at site 16-A1-12, located on the nearest escarpment protrusion to the west of Thabadimasego. The glass beads were part of a larger assemblage excavated from both sites, which included hundreds of decorated ceramic sherds, faunal remains, shell beads, metal objects and carbonised seeds.