Corbulo, however, notwithstanding his successes, thought he must use his good fortune with moderation, and sent Vologeses a message of remonstrance against the violence done to a Roman province, and the blockade of an allied and friendly king and of Roman cohorts. "He had better give up the siege, or he, Corbulo too would encamp in his territory, as on hostile ground." Casperius, a centurion selected for this mission, had an interview with the king at the town Nisibis, thirty-seven miles distant from Tigranocerta, and with fearless spirit announced his message. With Vologeses it was an old and deep conviction that he should shun the arms of Rome. Nor was the present going smoothly with him. The siege was a failure; Tigranes was safe with his troops and supplies; those who had under- taken the storming of the place had been routed; legions had been sent into Armenia, and other legions were ready to rush to the attack on behalf of Syria, while his own cavalry was crippled by want of food. A host of locusts, suddenly appearing, had devoured every blade of grass and every leaf. And so, hiding his fear and presenting a more conciliatory attitude, he replied that he would send envoys to the Roman emperor for the possession of Armenia and the conclusion of a lasting peace. He ordered Moneses to leave Tigranocerta, while he himself retired.