The siege of Agrigentum had lasted eight months. Imilcon made his forces take up their winter-quarters in it, to give them the necessary refreshment; and left this city (after laying it entirely in ruins) in the beginning of the spring. He afterwards besieged Gela, and took it, notwithstanding the succours which were brought by Dionysius the Tyrant, who had seized upon the government of Syracuse. Imilcon ended the war by a treaty with Dionysius. The conditions of it were, that the Carthaginians, besides their ancient acquisitions in Sicily, should still possess the country of the Sicanians,(618) Selinus, Agrigentum, and Himera; as likewise that of Gela and Camarina, with leave for the inhabitants to reside in their respective dismantled cities, on condition of their paying a tribute to Carthage; that the Leontines, the Messenians, and all the Sicilians, should retain their own laws, and preserve their liberty and independence: lastly, that the Syracusans should still continue subject to Dionysius. After this treaty was concluded, Imilcon returned to Carthage, where the plague still made dreadful havoc. (M102) Dionysius had concluded the late peace with the Carthaginians with no other view than to get time to establish his new authority, and make the necessary preparations for the war which he meditated against them.(619) As he was very sensible how formidable the power of this state was, he used his utmost endeavours to enable himself to invade them with success; and his design was wonderfully well seconded by the zeal of his subjects. The fame of this prince, the strong desire he had to distinguish himself, the charms of gain, and the prospect of the rewards which he promised those who should show the greatest industry; invited, from all quarters, into Sicily, the most able artists and workmen at that time in the world. All Syracuse now became in a manner an immense workshop, in every part of which men were seen making swords, helmets, shields, and military engines; and preparing all things necessary for building ships and fitting out fleets. The invention of vessels with five benches of oars (or _Quinqueremes_) was at that time very recent; for, till then, those with three alone(620) had been used. Dionysius animated the workmen by his presence, and by the applauses he gave, and the bounty which he bestowed seasonably; but chiefly by his popular and engaging behaviour, which excited, more strongly than any other conduct, the industry and ardour of the workmen;(621) and he frequently allowed those of them who most excelled in their respective arts the honour to dine with him.