 Since Simon’s commentary on the Parva naturalia does not contain commentaries on De sensu and De memoria, the best place to reconstruct his views on the physiological and psychological mechanisms of sensory cognition is his commentary on De somno et vigilia, which also covers De insomniis and De divinatione per somnum. Question 13* of this commentary provides broad accounts of the physiological and psychological mechanisms of dreams and divination in dreams (ed. Ebbesen 2013). 