[225] Plutarch, Adv. Col., xxii.-xxiii.; Seneca, Epp., ix.
[226] Zeller, Ph. d. Gr., III., a, 481; Diog. L., IX., xi.
[227] Zeller, op. cit., p. 484; Ritter and Preller, Hist. Ph., p. 336.
[228] ὡς χαλεπὸν εἴη ὁλοσχερῶς ἐκδῦναι ἄνθρωπον. For this and the other stories, see Diog. L., IX., 66-8.
[229] Pyrrh. Hyp., I., 28 ff.
[230] Diog. L., VII., 171.
[231] Cicero, Acad., II., xxiv., 77; Sext. Emp., Adv. Math., VII., 150-7; Zeller, Ph. d. Gr., III., a, pp. 492 ff.
[232] Plutarch, De Comm. Notit., i., 4; Zeller, op. cit., p. 81 (where, however, the reference to Plutarch is wrongly given).
[233] Εἰ μὴ γὰρ ἦν Χρύσιππος οὐκ ἂν ἦν ἐγώ. (Diog. L., IV., 62.) The original line ran, εἰ μὴ γὰρ ἦν Χρύσιππος οὐκ ἂν ἦν στοά.
[234] Sext. Emp., Adv. Math., VII., 159-65.