v. 1. The ethical treatises, being the treatises of the first Ennead with Porphyry's Life of Plotinus, and the Preller-Ritter extracts forming a conspectus of the Plotinian system. Psychic and physical treatises; comprising the second and third Enneads.--v. 2. On the nature of the soul [being the foruth Ennead] The divine mind, being the treatises of the fifth Ennead. On the One and Good being the treatises of the sixth Ennead.