Polybios says that Hannibal marched eastward from the crossing of the Rhone, following the river up-stream. As the crossing was at Tarascon (or close by) an eastward march would carry him along the Durance, which here runs from east to west: see paragraph 34. Livy says that on leaving the so-called Island at the confluence of the tributary and the Rhone, Hannibal turned to the _left_ into the territory of the Tricastini instead of going straight on to the Alps; and Hannibal could not have done this unless he was on the route along the Durance to the Alps. He would turn to the _right_ to reach their territory if he were going along the Isère or any other river further north; see paragraph 32. 66. On the other hand, there is Livy’s statement that the tributary river was the Saône, contradicting his own statement about Hannibal’s turning to the left, and also contradicting the statements of Polybios about the length of Hannibal’s march. But why should Livy contradict himself and also contradict Polybios, whom he usually follows word for word? My suggestion is that he took “Scôras” in Polybios for Saucona or a variant of that name, and called the tributary the Saône without considering what that implied. The error would not be striking, if Hasdrubal went that way, as people would confuse his route with Hannibal’s. 67. There is really nothing in the argument that Hannibal would not venture to march along the Durance as the Romans might attack him on the flank. In the first place, there were no Romans there. As soon as Scipio found he was too late to defend the crossing of the Rhone, he went straight back to the coast, re-embarked his army, and sailed off: he was not ashore for more than about a week--see paragraph 41. In the second place, Hannibal had no reason to fear the Romans. He was in superior force, and could have crushed Scipio then as easily as he crushed him at the Trebia two months later on, but he did not want to fight just then, as he saw that victories in Provence would not produce the same effect at Rome as victories in Italy itself: see paragraph 13.