fugiens sane Macrinus cum paucis et filio in vico quodam Bithyniae occisus est cum Diadumeno, ablatumque eius caput est et ad Antoninum perlatum. Sciendum praeterea quod Caesar fuisse dicitur non Augustus Diadumenus puer, quem plerique pari fuisse cum pate imperio tradiderunt. occisus est etiam filius, cui hoc solum attulit imperium, ut interficeretur a milite.
Translation :
He did, indeed, escape from the battle together with his son and a few others, but he and Diadumenianus were afterwards slain in a certain village of Bithynia, and his head was cut off and carried to Antoninus. It should be recorded, furthermore, that the boy Diadumenianus is said to have been made merely Caesar and not Augustus, for many have related that he had equal power with his father. The son also was slain, having gotten from his power only this — that he should be killed by the soldiery.
Edition :
Historia Augusta, Volume II: Caracalla. Geta. Opellius Macrinus. Diadumenianus. Elagabalus. Severus Alexander. The Two Maximini. The Three Gordians. Maximus and Balbinus. Translated by David Magie. Loeb Classical Library 140. Cambridge, MA: Harvard University Press, 1924
