Aristotle's pupil and successor as head of the Lyceum, d. ca 286BC. Two and possibly three of these theses were drawn directly or indirectly from reputed fragments of Theophrastus' Metaphysics. No copy of that treatise is listed in known inventories of Pico's library. Latin scholastics in addition knew something of Theothrastus' doctrine of the active and passive intellects via Themistius' Paraphrase of De anima, which Pico read in Ermolao Barbaro's translation, which was printed in 1481.
Farmer in Syncretism in the West: Pico's 900 Theses.