[49] Gellius, Noct. Att., XII., v., 7, quoted by Ritter and Preller, p. 395.
[50] Dissert., I., xix., II.
[51] Ibid., xxii., 9, ff.
[52] Cicero, Tusc. Disput., IV., xix. ff.
[53] Cic., Tusc. Disput., IV., vi.
[54] Zeller, p. 229.
[55] See the Dissertations of Epictêtus throughout.
[56] Plutarch, De Communibus Notitiis, cap. xxxiii., p. 1076 B.
[57] Cf. Zeller, p. 583.
[58] Zeller, pp. 260-1.