De scorpionibus et catapultis et ballistis etiamque testudinibus et turribus, quae maxime mihi videbantur idonea et a quibus essent inventa et quemadmodum fieri deberent, explicui.
With reference to scorpions and catapults and balistae, and also tortoises and towers, I have explained the details which seemed to me most suitable, stating the names of their inventors, and how they should be constructed.
final_alignments\Vitruvius_Architecture_Book_10.json