[335]. Ad fam. xv. 15.
[336]. Ad fam. iv. 9.
[337]. Cic. Brut. 96.
[338]. Tusc. ii. 2.
[339]. See on this question the very interesting work of M. Martha, Les Moralistes sous l’Empire Romain.
[340]. Ad Att. xv. 2.
[341]. Quint. x. 1.
[342]. Sen. Cons. ad Helv. 9.
[343]. Epist. Brut. i. 16.
[344]. App. De bell. civ. iv. 133.