1. Institute of Pre- and Protohistoric Archaeology, Johanna-Mestorf-Str. 2-6, Kiel University, 24118 Kiel, Germany
2. Archaeology Department, McGregor Museum, Kimberley, 8301, South Africa
3. Department of National Museum and Monuments, Khama Crescent, Gaborone, 9999, Botswana
4. Department of History, University of Botswana, Private Bag UB 0022, Gaborone, Botswana