Anne Kandler1, James Steele2,3. 1. Department of Human Behavior, Ecology and Culture, Max Planck Institute for Evolutionary Anthropology, Leipzig 04103, Germany; anne_kandler@eva.mpg.de. 2. Institute of Archaeology, University College London, London WC1H 0PY, United Kingdom. 3. Department of Archaeology, School of Geography, Archaeology and Environmental Sciences, University of the Witwatersrand, WITS 2050, South Africa.