cf. Letters cxlvi. and ccxxxix.  Maran. (Vit. Bas). is of opinion that as these two letters, clvii. and clviii., written at the same time, are very much in the same terms, they cannot be to the same person, and thinks that the sluggishness, which Basil complains of, fits with Eusebius much better than with Antiochus, who could not travel without his uncle’s permission.