[259] And after a brief interval, he dictated to one of his secretaries an answer to Petronius, praising him in appearance for his prudence, and for his careful and accurate consideration of the future, for he was very careful with respect to the governors of the provinces, seeing that they had at all times great facilities for making innovations or revolutions, especially if they happened to be in districts of importance, and in command of powerful armies such as was on the Euphrates for the protection of Syria.