Late Development

"When Constantine (III) heard of the death of Ediovinchus he cast aside his purple robe and imperial ornaments, and repaired to the church, where he caused himself to be ordained as presbyter. Those within the walls, having first received oaths, opened the gates, and their lives were spared. From that period the whole province returned to its allegiance to Honorius, and has since been obedient to the rulers of his appointment. Constantine, with his son Julian, was sent into Italy, but he was waylaid and killed... Not long afterwards ... Maximus ... and many others who had conspired against Honorius, were unexpectedly slain... After Constantius, who was a brave and able general, had destroyed the tyrant Constantine, the emperor rewarded him by giving him his sister in marriage; he also bestowed upon him the ermine and purple, and admitted him to a share in the government."
Salminius Hermias Sozomen (ca. 400-ca. 450) was a historian of the Christian church. Variations on his name include Sozomen, Salamanes or Salaminius Hermias Sozomenus. Since Constatine III was killed (vs executed)in 411, his makes his work a lot more contemporary than WIKIPEDIA