Hieronymus (; 231–214 BC) was a tyrant of Syracuse. He succeeded his grandfather, Hiero II, in 215 BC. He was at this time only fifteen years old, and he ascended the throne at a crisis full of peril, for the Battle of Cannae had given a shock to the Roman power, the influence of which had been felt in Sicily; and though it had not shaken the fidelity of the aged Hiero, yet a large party at Syracuse was already disposed to abandon the alliance of Rome for that of Carthage. The young prince had already given indications of weakness, if not depravity of disposition, which had alarmed his grandfather, and caused him to confide the guardianship of Hieronymus to a council of fifteen persons, among whom were his two sons-in-law, Andranodorus and Zoippus. But the objects of this arrangement were quickly frustrated by the ambition of Andranodorus, who, in order to get rid of the interference of his colleagues, persuaded the young king to assume the reins of government, and himself set the example of resigning his office, which was followed by the other guardians. Hieronymus now became a mere tool in the hands of his two uncles, both of whom were favourable to the Carthaginian alliance – and Thrason, the only one of his counsellors who retained any influence over his mind, and who was a staunch friend of the Romans, was soon got rid of by a charge of conspiracy. The young king now sent ambassadors to Hannibal, and the envoys of that general, Hippocrates and Epicydes, were welcomed at Syracuse with the highest honours. On the other hand, the deputies sent by Appius Claudius, the Roman praetor in Sicily, were treated with the utmost contempt and it was evident that Hieronymus was preparing for immediate hostilities. He sent ambassadors to Carthage, to conclude a treaty with that power, by the terms of which the river Himera was to be the boundary between the Carthaginians and Syracusans in Sicily but he quickly raised his demands, and, by a second embassy, laid claim to the whole island for himself. The Carthaginians readily promised everything, in order to secure his alliance for the moment, and he assembled an army of fifteen thousand men, with which he was preparing to take the field, having previously dispatched Hippocrates and Epicydes to sound the disposition of the cities subject to Rome, when