This interval of liberty was of no long duration. Agathocles, in a short time, makes himself tyrant of Syracuse. He commits unparalleled cruelties. He forms one of the boldest designs related in history, carries the war into Africa, makes himself master of the strongest places, and ravages the whole country. After various events, he perishes miserably, after a reign of about twenty-eight years[259]. Syracuse took new life again for some time, and tasted with joy the sweets of liberty. But she suffered much from the Carthaginians, who disturbed her tranquillity by continual wars. She called in Pyrrhus to her aid. The rapid success of his arms at first gave him great hopes, which soon vanished. Pyrrhus, by a sudden retreat, plunged the Syracusans into new misfortunes. They were not happy and in tranquillity till the reign of Hiero II., which was very long, and almost always pacific. Hieronymus scarce reigned one year. His death was followed with great troubles, and the taking of Syracuse by Marcellus. Of this celebrated siege, since it was the ruin of Syracuse, it is our duty to give some account. “The Romans carrying on their attacks at two different places, Syracuse was in great consternation, and apprehended that nothing could oppose so terrible a power, and such mighty efforts; and it had indeed been impossible to have resisted them, without the assistance of a single man, whose wonderful industry was every thing to the Syracusans—this was Archimedes. He had taken care to supply the walls with all things necessary to a good defence. As soon as his machines began to play on the land-side, they discharged upon the infantry all sorts of darts, and stones of enormous weight, which flew with so much noise, force, and rapidity, that nothing could oppose their shock. They beat down and dashed to pieces all before them. “Marcellus succeeded no better on the side of the sea. Archimedes had disposed his machines in such a manner as to throw darts to any distance. Though the enemy lay far from the city, he reached them with his larger and more forcible balistæ and catapultæ. When they overshot their mark, he had smaller, proportioned to the distance, which put the Romans into such confusion as made them incapable of attempting any thing.