A strong guard in the meantime held the advanced works against any sorties of the Saguntines.
These, on their side, worked night and day, and by the time the Carthaginians again advanced the wall was rebuilt and the breach closed.
But Hannibal had also been busy.

Seeing that it was impossible for his troops to win an entrance by a breach, as long as the Saguntines occupied every point commanding it, he caused a vast tower to be built, sufficiently lofty to overlook every point of the defences, arming each of its stages with catapults and ballistas.

He also built near the walls a great terrace of wood higher than the walls themselves, and from this and from the tower he poured such torrents of missiles into the town that the defenders could no longer remain upon the walls.

Five hundred Arab miners now advanced, and these, setting to work with their implements, soon loosened the lower stones of the wall, and this again fell with a mighty crash and a breach was opened.
The Carthaginians at once swarmed in and took possession of the wall; but while the besiegers had been constructing their castle and terrace, the Saguntines had built an interior wall, and Hannibal saw himself confronted with a fresh line of defences.
As preparations were being made for the attack of the new defences messengers arrived saying that the Carpatans and Orotans, furious at the heavy levies of men which had been demanded from them for the army, had revolted.

Leaving Maharbal to conduct the siege in his absence, Hannibal hurried away with a portion of his force, and returned in two months, having put down the revolt and severely punished the tribesmen.
While the siege had been continuing the Romans had been making vain efforts to induce the Carthaginians to desist.