When the rest of the army was safe on the left bank a camp was pitched, and orders given for the morrow. Hannibal's great anxiety was for the passage of the elephants, still on the other side, for the great creatures on whose help he counted, perhaps more than he should, were terribly afraid of water. But no man ever lived who was cleverer at forming schemes than Hannibal, and at last he hit on one which he thought would do. Five hundred of his light-armed horsemen from the African province of Numidia were despatched down the river to find out how many soldiers Scipio had with him, the number and size of the ships that had arrived, and, if possible, the consul's future plans. Then the general chose out some men who were specially fitted to manage the elephants, and bade them recross the river immediately, giving them exact directions what they were to do when they were once more on the right bank. The plan Hannibal had invented for the passage of the elephants was this. The men whom he had left on the other side of the Rhone were ordered to cut down more trees as fast as possible, and chop them into logs, which were bound firmly together into rafts about fifty feet broad; when finished, these rafts were standing on the bank, lashed to trees and covered with turf, so that they looked just like part of the land. The rafts stretched a long way into the river, and the two furthest from the bank were only tied lightly to the others, in order that their ropes might be cut in a moment. By this means Hannibal felt that it would be possible for the elephants to be led by their keepers as far as the outermost rafts, when the ropes would be severed, and the floating platform rowed towards the further shore. The elephants, seeing the water all round them, would be seized with a panic, and either jump into the river in their fright and swim by the side of the raft, guided by their Indian riders, or else from sheer terror would remain where they stood, trembling with fear. But though the rafts were to be built without delay, the passage was on no account to be attempted till the signal was given from Hannibal's camp. * * * * * Meanwhile the Numidians on their way down the left bank of the Rhone had nearly reached the Roman headquarters when they met the party of cavalry whom Scipio, on his side, had sent out to reconnoitre. The two detachments at once fell upon each other and fought fiercely, and then, as Hannibal had directed, the Numidians retreated, drawing the Romans after them, till they were in sight of the Carthaginian entrenchments. Here the cavalry pulled up, and returned unpursued to Scipio with the news that they had defeated the famous Numidian horsemen in a hot skirmish, and that Hannibal was entrenched higher up the river. Immediately Scipio broke up his camp and began his march northwards, which was just what Hannibal wanted.