sentences:  Hannibal put Hanno, son of Bomilcar, in charge of a mobile column made up of infantry and cavalry on the third night, and sent this force upriver under cover of darkness to find another suitable crossing place.Led by local guides, Hanno located a crossing about to the north of the Carthaginian camp near an "island", and crossed the river undetected.His Spanish fighters, which composed most of his forces probably on the account of being their best swimmers, crossed the river with their shields over inflated animal skins, being followed by the rest of the detachment on hastily built rafts.