Still the Carthaginians were so securely posted in their strongholds, that Pyrrhus supposed the work of dislodging them by force would be a slow, and tedious, and perhaps doubtful undertaking. His bold and restless spirit accordingly conceived the design of leaving them as they were, and going on in the prosecution of his original design, by organizing a grand expedition for the invasion of Africa. In fact, he thought this would be the most effectual means of getting the Carthaginians out of Sicily; since he anticipated that, if he were to land in Africa, and threaten Carthage itself, the authorities there would be compelled to recall all their forces from foreign lands to defend their own homes and firesides at the capital. He determined, therefore, to equip his fleet for a voyage across the Mediterranean without any delay. He had ships enough, but he was in want of mariners. In order to supply this want, he began to impress the Sicilians into his service. They were very reluctant to engage in it, partly from natural aversion to so distant and dangerous an enterprise, and partly because they were unwilling that Pyrrhus should leave the island himself until their foreign foes were entirely expelled. "As soon as you have gone," they said, "the Carthaginians and the Mamertines will come out from their hiding-places and retreats, and the country will be immediately involved in all the difficulties from which you have been endeavoring to deliver us. All your labor will have been lost, and we shall sink, perhaps, into a more deplorable condition than ever."