 The Aristotelian Quaestiones are to be found in a single manuscript, Amiens MS Bibl. Mun. 406. The materials found in this manuscript include two sets of questions on the Physics and two sets of questions on the Metaphysics of Aristotle, the questions on the Liber de causis, and the Pseudo-Aristotelian De vegetabilibus. As noted above, three of the questions on the Physics and Metaphysics can now be excluded from Bacon’s canon. A new version of Bacon’s second set of questions on the Physics inter-textually excerpted by another thirteenth-century author has recently been identified by Silvia Donati in Philadelphia MS Free Library, Lewis Europe, ff. 77ra-85rb (Donati 1997). This is an important discovery that has enabled scholars for the first time to carry out a critical-textual study of Bacon’s works on Aristotle’s Physics in the context of the development of English natural philosophy in the period 1240–1300.