  Godfrey’s library contains two likely sources for this theory, first a rudimentary version found in the abbreviated text of Siger of Brabant’s Quaestiones in Metaphysicam included in Godfrey’s Student Notebook, and second, an anonymous set of questions contained in the manuscript Bibl. Nat. lat. 16.096. While Godfrey literally borrows certain parts of his theory from the second text, he does not follow this anonymous Radical Aristotelian Arts Master when he goes on to argue that separate entities do not depend upon God as their efficient cause, but only as their final cause (Wippel, 1984, 231–44).