 It is generally agreed that Scotus’s earliest works were his commentaries on the Old Logic: questions on Porphyry’s Isagoge and Aristotle’s Categories, two sets of questions on Peri hermeneias, and De sophisticis elenchis. These probably date to around 1295; the Quaestiones super De anima is also very likely an early work (the editors date it to the late 1280s or early 1290s). Scotus’s other Aristotelian commentary, the Quaestiones super libros Metaphysicorum Aristotelis, seems to have been started early; but Books VI through IX are all late or were at least revised later in Scotus’s career. Scotus also wrote an Expositio on Aristotle’s Metaphysics. It had been unidentified for centuries but was recently identified and edited by Giorgio Pini.