Marcus replaced a number of the empire's major officials. The "ab epistulis" Sextus Caecilius Crescens Volusianus, in charge of the imperial correspondence, was replaced with Titus Varius Clemens. Clemens was from the frontier province of Pannonia and had served in the war in Mauretania. Recently, he had served as procurator of five provinces. He was a man suited for a time of military crisis. Lucius Volusius Maecianus, Marcus's former tutor, had been prefectural governor of Egypt at Marcus's accession. Maecianus was recalled, made senator, and appointed prefect of the treasury ("aerarium Saturni"). He was made consul soon after. Fronto's son-in-law, Gaius Aufidius Victorinus, was appointed governor of Germania Superior.