Richard Rufus of Cornwall was educated as a philosopher at Paris where he was a master of arts.Thomas Eccleston, De adventu Fratrum minorum in Angliam c. 6 (Manchester: Manchester University Press, 1951), p. 30. In 1238, after lecturing on Aristotle’s libri naturales, Rufus became a Franciscan and moved to Oxford to study theology, becoming the Franciscan master of theology in about 1256 and probably dying not long after 1259.A. Little, “The Franciscan School at Oxford in the Thirteenth Century,” Archivum Franciscanum Historicum 19 (1926): 842–45. Wills and Inventories, Surtees Society Publications 2 (London: J.B. Nichols, 1835), pp. 10–11. Cf. A. Little, The Grey Friars in Oxford (Oxford: Clarendon Press, 1892), p. 143.