. "a celebrated Roman jurist under the emperors Septimius Severus , Caracalla , Heliogabalus , and Alexander Severus , fragments of whose writings are found in the Pandects; he was murdered in Gaul" . "a celebrated Roman jurist under the emperors Septimius Severus , Caracalla , Heliogabalus , and Alexander Severus , fragments of whose writings are found in the Pandects; he was murdered in Gaul" . .