10. Publius Cornelius Scipio, the father of the elder Africanus, when about to go to the assistance of the citizens of Saguntum--celebrated for the distresses which they endured, and for their loyalty to Rome, at the time when they were besieged with great resolution by the Carthaginians--led to the Spanish coast a fleet having on board a numerous army. But after the city had been destroyed by the valour of the Carthaginians, he, being unable to overtake Hannibal, who had crossed the Rhone, and had obtained three days' start of him in the march towards Italy, crossed the sea, which at that point was not wide, making a rapid voyage; and taking his station near Genoa, a town of the Ligures, awaited his descent from the mountains, so that, if chance should afford him an opportunity, he might attack him in the plain while still fatigued with the ruggedness of the way by which he had come. 11. But still, having regard to the interests of the republic, he ordered Cnæus Scipio, his brother, to go into Spain, to prevent Hasdrubal from making a similar expedition from that country. But Hannibal, having received information of their design by some deserters, being also a man of great shrewdness and readiness of resources, obtained some guides from the Taurini who inhabited those districts, and passing through the Tricastini and through the district of the Vocontii, he thus reached the defiles of the Tricorii.[54] Then starting from this point, he made another march over a line previously impassable. And having cut through a rock of immense height, which he melted by means of mighty fires, and pouring over it a quantity of vinegar, he proceeded along the Druentia, a river full of danger from its eddies and currents, until he reached the district of Etruria. This is enough to say of the Alps; now let us return to our original subject. XI. § 1. In former times, when these provinces were little known, as being barbarous, they were considered to be divided into three races:[55] namely, the Celtæ, the same who are also called Galli; the Aquitani, and the Belgæ: all differing from each other in language, manners, and laws. 2. The Galli, who, as I have said, are the same as the Celtæ, are divided from the Aquitani by the river Garonne, which rises in the mountains of the Pyrenees; and after passing through many towns, loses itself in the ocean. 3. On the other side they are separated from the Belgians by the Marne and the Seine, both rivers of considerable size, which flowing through the tribe of the Lugdunenses, after surrounding the stronghold of the Parisii named Lutetia, so as to make an island of it, proceed onwards together, and fall into the sea near the camp of Constantius.