^Polydore Vergil, in his Anglica Historia (页面存档备份,存于互联网档案馆) of 1534 (Book XIX.36) dates the Dukedom to 1361 and claims to have rediscovered the lost origins of the name. See also David Hatton, Clare, Suffolk, an account of historical features of the town, its Priory and its Parish Church, 2006, Book 1, p21 ISBN0-9524242-3-1 It is also available online on the Clare website (页面存档备份,存于互联网档案馆). See also the Oxford Dictionary of National Biography s.v. 'Lionel [Lionel of Antwerp], duke of Clarence': "Lionel's elevation to the title of duke of Clarence (meaning the town, castle, and honour of Clare)".