Graeme Barker is Disney Professor of Archaeology, Director of the McDonald Institute for Archaeological Research and Professorial Fellow, St John's College, University of Cambridge. He is the author of The Agricultural Revolution in Prehistory and Prehistoric Farming in Europe (Cambridge, 1985). Candice Goucher is a Professor of History at Washington State University, Vancouver. She studied Chemistry and Visual Arts at the University of California, San Diego (B.A., 1975), Art History and Archaeology at Columbia University (M.A., 1978), and African History at the University of California, Los Angeles (Ph.D., 1984). As an undergraduate, she pioneered the use of lead isotope analysis to identify ancient sources of metals, research published in Nature. Trained as an archaeologist, Candice Goucher has conducted archaeological and historical research in the Caribbean, Mauritius, and West Africa, where she worked with Merrick Posnansky at the site of Begho in Brong Ahafo, Ghana, and in the Bassari region of Togo. He
