Robert Sewell Powys based on the following sources: Sewell Vincent Sample (1928 ...

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Robert Sewell Powys based on the following sources: Sewell Vincent Sample (1928 – 2005): Letters (perhaps based on John Edward Lloyd: A history of Wales: from the earliest times to the Edwardian Conquest, Longmans, Green & Co.,1911.) The Anglo Saxon Chronicle, Everyman Press, London, 1912 David C. Douglas: William the Conqueror, Berkeley, California, 1964 John Davies: A History of Wales, London, 1993 (published in Welsh as Hames Cymru in 1990) Norman F. Cantor (ed.) The Encyclopædia of the Middle Ages, New York, 1999

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