Robert Ross recently retired as Professor of African History at Leiden University in the Netherlands. He is the author of numerous books on the history of southern Africa, notably the Cape Colony, including most recently The Borders of Race in Colonial South Africa: The Kat River Settlement, 1829-1856 (Cambridge, 2014). He was also one of the editors of both volumes of The Cambridge History of South Africa (Cambridge, 2010 and 2011).