Euseb. in Vit. Constantin. l. iv. c. 5 1 . Julian, Orat. i. p. 1 l-16, with Spanheim's elaborate Commentary. Libanius, Orat. iii. p. 109 [ed. Paris, 1627] . Constantius studied with laudable diligence -but the dulness of his fancy prevented him from succeeding in the art of poetry, or even of rhetoric.