sentences:  His research centred around the emergence of modern humans and multidisciplinary African archaeology.He was principal researcher at the well-known sites of Scott's Cave, Amanzi, Howiesons Poort, Wilton, Melkhoutboom, Highlands, Boomplaas and Matjes River, and latterly at Klasies River, one of the oldest known cave sites with well-preserved anatomically modern human remains dating from circa 115,000 years ago.Deacon taught archaeology at the University of Stellenbosch and authored over a hundred publications in journals, books, monographs and conference proceedings.