Res Gestae

Now, while these generals were guarding the frontiers assigned them, and the hidden purposes of that most deceitful nation were being observed, he himself with the stronger part of his army was attending to urgent affairs (getting ready for battle) and now and then sallying forth to protect the towns.[*](That is, the towns in the neighbourhood of Edessa. He made a move only when these towns were threatened.) But the scouts and deserters who appeared from time to time brought conflicting accounts, being uncertain what would happen, because among the Persians plans are communicated to none save the grandees, who are reticent and loyal, and with whom among their other gods Silence is honoured.[*](Cf. Curtius, iv. 6, 5 f.)