a centurion who served under the prefect Caelius Pollio, and commanded the garrison of a stronghold called Gorneae in A. D. 52, during a war between the Armenians and Hiberians. Caelius Pollio acted the part of a traitor towards the Armenians, but found an honest opponent in Casperius, who endeavoured, though in vain, to induce the Hiberians to raise the siege. In A. D. 62 we find him still serving as centurion in Armenia, and Corbulo sent him as ambassador to Vologeses to expostulate with him respecting his conduct. (Tac. Ann. 12.45, 15.5.)