18. The choice of Constantine by his dying father, which is warranted by reason, and insinuated by Eumenius, seems to be confirmed by the most unexceptionable authority, the concurring evidence of Lactantius (de M. P. c. 24) and of Libanius (Oratio i ), of Eusebius (in Vit. Constantin. 1. i. C. 21) and of Julian (Oratio i. [p. 7])