  Some of William's later works have also been identified. Although no editions have been published, several articles contain extensive excerpts. William is known to have written commentaries on Porphyry's Isagoge, Aristotle's Categories and De Interpretatione, Boethius' De Differentiis Topicis, and Cicero's De Inventione and Rhetorica ad Herennium.  Some of his theological writings, along with those of other leading French theologians, were compiled in the later twelfth century under the title Liber Pancrisis. These have been edited as the ‘Sententiae’ of William of Champeaux (Lottin 1956). The Liber Pancrisis is thought to be a compilation of the best Parisian theology of the period, and so it is likely to represent William's most advanced views.