This noted capital was then one of the largest and richest cities of the Grecian world. For three years it held out against the Roman forces. It is said that Archimedes (see p. 213), the great mathematician, rendered valuable aid to the besieged with curious and powerful engines contrived by his genius. But the city fell at last, and was given over to sack and pillage. Rome was adorned with the rare works of Grecian art--paintings and sculptures--which for centuries had been accumulating in this the oldest and most renowned of the colonies of ancient Hellas. Syracuse never recovered from the blow inflicted upon her at this time by the relentless Romans. [Illustration: MARCELLUS, "The sword of Rome."] Capua must next be punished for opening her gates and extending her hospitalities to the enemies of Rome. A line of circumvallation was drawn about the devoted city, and two Roman armies held it in close siege. Hannibal, ever faithful to his allies and friends, hastened to the relief of the Capuans. Unable to break the enemy's lines, he marched directly upon Rome, as if to make an attack upon that city, hoping thus to draw off the legions about Capua to the defence of the capital. The "dread Hannibal" himself rode alongside the walls of the hated city, and, tradition says, even hurled a defiant spear over the defences. The Romans certainly were trembling with fear; yet Livy tells how they manifested their confidence in their affairs by selling at public auction the land upon which Hannibal was encamped. He in turn, in the same manner, disposed of the shops fronting the Forum. The story is that there were eager purchasers in both cases. Failing to draw the legions from Capua as he had hoped, Hannibal now retired from before Rome, and, retreating into the southern part of Italy, abandoned Capua to its fate. It soon fell, and paid the penalty that Rome never failed to inflict upon an unfaithful ally. The chief men in the city were put to death, and a large part of the inhabitants sold as slaves. Capua had aspired to the first place among the cities of Italy: scarcely more than the name of the ambitious capital now remained. Hasdrubal attempts to carry Aid to his Brother.--During all the years Hannibal was waging war in Italy, his brother Hasdrubal was carrying on a desperate struggle with the Roman armies in Spain. At length he determined to leave the conduct of the war in that country to others, and go to the relief of his brother, who was sadly in need of aid. Like Pyrrhus, Hannibal had been brought to realize that even constant victories won at the cost of soldiers that could not be replaced, meant final defeat.