Hannibal was only five days' march beyond Rome, and his officers wanted him to turn back and attack it in the first shock of the defeat, but he could not expect to succeed without more aid from home, and he wanted to win over the Greek cities of the south; so he wintered in Campania, waiting for the fresh troops he expected from Africa or from Spain, where his brother Mago was preparing an army. But the Carthaginians did not care about Hannibal's campaigns in Italy, and sent no help; and Publius Cornelius Scipio and his brother, with a Roman army in Spain, were watching Mago and preventing him from marching, until at last he gave them battle and defeated and killed them both. But he was not allowed to go to Italy to his brother, who, in the meantime, found his army so unstrung and ill-disciplined in the delightful but languid Campania, that the Romans declared the luxuries of Capua were their best allies. He stayed in the south, however, trying to gain the alliance of the king of Macedon, and stirring up Syracuse to revolt. Marcellus, who was consul for the third time, was sent to reduce the city, which made a famous defence, for it contained Archimedes, the greatest mathematician of his time, who devised wonderful machines for crushing the besiegers in unexpected ways; but at last Marcellus found a weak part of the walls and surprised the citizens. He had given orders that Archimedes should be saved, but a soldier broke into the philosopher's room without knowing him, and found him so intent on his study that he had never heard the storming of the city. The man brandished his sword. "Only wait," muttered Archimedes, "till I have found out my problem;" but the man, not understanding him, killed him.
Hannibal remained in Italy, maintaining himself there with wonderful skill, though with none of the hopes with which he had set out. His brother Hasdrubal did succeed in leaving Spain with an army to help him, but was met on the river Metaurus by Tiberius Claudius Nero, beaten, and slain. His head was cut off by Nero's order, and thrown into Hannibal's camp to give tidings of his fate.
Young Scipio, meantime, had been sent to Spain, where he gained great advantages, winning the friendship of the Iberians, and gaining town after town till Mago had little left but Gades and the extreme south. Scipio was one of the noblest of the Romans, brave, pious, and what was more unusual, of such sweet and winning temper, that it was said of him that wherever he went he might have been a king.