The archery, too, of the Atreni was effective at very long range, since they hurled some of their missile by means of engines, so that they actually struck many even of Severus' guards; for they discharged two missiles at one and the same shot and there were many hands and many bows hurling the missiles all at the same time.
Edition :
Dio's Roman History. Cassius Dio Cocceianus. Earnest Cary. Herbert Baldwin Foster. William Heinemann, Harvard University Press. London; New York. 1914-.