Res Gestae

Finally, a few days later, after the affair had been more thoroughly investigated before Mamertinus, the praetorian prefect, then sitting in judgement, Nigrinus as the chief instigator of the war was burned alive. But after him Romulus and Sabostius, senators of Aquileia, being convicted of having sown the seeds of discord without regard to its dangerous consequences, died by the executioner’s sword. All the rest, whom compulsion, rather than inclination, had driven to this mad strife, escaped unpunished. For so the emperor, naturally mild and merciful, had decided on grounds of justice.