Herodian, 1. ii. p. 78. Severus was declared emperor on the banks of the Danube, either at Carnuntum, according to Spartianus (Hist. August. p. 65), or else at Sabaria, according to Victor. Mr. Hume, in supposing that the birth and dignity of Severus were too much inferior to the Imperial crown, and that he marched in Italy as general only, has not considered this transaction with his usual accuracy (Essay on the original contract).