Sam Challis is Head and Senior Researcher at the Rock Art Research Institute, University of the Witwatersrand. His focus is on the interaction between hunter-gatherers, pastoralists and farmers, as well as Europeans, as expressed in rock art around the world. His DPhil focused on the acquisition of horses by creolized raider groups in the nineteenth-century, and his research programme in the mountains of Matatiele in the Eastern Cape, aims to redress the imbalance of this neglected former-apartheid region while training local community Field Technicians.