1. Aquinas, Thomas,Summa theologiae, ed. by Thomas Gilby and others, 61 vols (London: Blackfriars, 1964–1981)
2. Augustine,On the Trinity: Books 8–15, ed. by Gareth B. Matthews, trans. by Stephen McKenna (Cambridge: Cambridge University Press, 2002)
3. Bartholomaeus Anglicus,De proprietatibus rerum, ed. by Baudouin van den Abeele and others, 2 of 6 vols, ‘De diversis artibus’, 78–79 (Turnhout: Brepols, 2007–)
4. ———,On the Properties of Things: John Trevisa’s Translation of Bartholomaeus Anglicus De Proprietatibus rerum, ed. by M. C. Seymour and others, 3 vols (London: Oxford University Press, 1975–2019)
5. Descartes, René,Meditations on First Philosophy(1641), inMeditations, Objections, and Replies, ed. and trans. by Roger Ariew (Indianapolis: Hackett, 2000), pp. 97–132