"University of St. Andrews. Library. Reserve Collection." . . . . . "Plotinus: 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, translated from the Greek by Stephen MacKenna"@en . . . . "Early works"@en . "Early works" . . "Ethical treatises"@en . "Ethical treatises" . . . . . . . . "Plotinus 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 /ctranslated from the Greek by Stephen MacKenna"@en . "Plotinus 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 /ctranslated from the Greek by Stephen MacKenna" . . .