 It will be clear from this account that Roger Bacon was an important teacher of the Arts at Paris in the 1240s. He was ahead of his time in the vigorous manner in which he integrated the new Aristotle with the traditional Latin traditions of grammar and logic. He taught for a long period in the Arts. He later called himself an expert in the philosophy of Aristotle as interpreted by Avicenna and Averroes. And we should also add Avicebron (Solomon Ibn Gabirol). By 1248–49 he seems to have become an independent scholar. He then, it would seem, returned to England, where, under the influence of Adam Marsh, friend of Robert Grosseteste, Bishop of Lincoln, he was attracted to interests associated with both scholars: language study including the learning of ancient languages, experimental concerns such as optics and experimental science, and a renewed critical study of the text of Scripture. When Bacon returned to Paris in the 1250s, he was to oppose what had become a profound change in the methodology of university learning, that is, the introduction of the “Sentence-Method” into the study of theology. For Bacon, this was a destruction of practices that he associated with Robert Grosseteste. Taking up the flag of the Bishop of Lincoln (d. 1253), he became the great critic of the Parisian mode of doing philosophy and theology. As we saw above, Bacon was already by 1266 very concerned with the new heterodox interpretations of Aristotle found in the Faculty of Arts. His later works for Pope Clement IV must be read in the context of the Parisian debates on Latin Averroism (1266–1277).