 Among the Greek philosophers, John’s knowledge was meager at best, if only because the language of ancient Greece was almost entirely absent in the Latin West during the twelfth century. Until the dissemination of Latin translations of the Aristotelian corpus, and a few works by Plato, over the course of the thirteenth century, little in the way of acquaintance was possible. The only one of Plato’s texts that John could have accessed was the Timaeus in the partial translation by Calcidius; among Aristotle’s writings, he clearly was somewhat familiar with the six books of the Organon, which formed the foundation for the Aristotelian logical and “scientific” system. In an undated letter to his former teacher Richard of l’Évêque, John expresses interest in acquiring (unspecified) works by Aristotle (JL2: 294–95). (Bloch 2012 offers a thorough analysis of the technical aspects of John’s use of classical sources in his philosophy, with special, but not exclusive, attention to Aristotle.)