34. Livy says (xxi. 31) that after getting across the Rhone, Hannibal marched up the other bank towards the interior of Gaul, whereas Polybios says (iii. 47. 1) that he marched eastward (_hôs epi tên heô_) going along the river up-stream. (His phrase for “up-stream” here is “away from the sea, towards the interior of Europe,” and in iii. 39. 9, speaking of the same march, his phrase is “towards the sources.”) Livy has put Gaul for Europe, and omitted “eastward.” But if Hannibal marched eastward here, he must have marched along the Durance, not the Rhone, as the Durance here runs from east to west and the Rhone from north to south. No doubt, Polybios says (iii. 47. 2, 3) that the Rhone had its sources on the north side of the Alps, its sources facing west (_pros tên hesperan_), and that its course was south-west (_pros tas cheimerinas dyseis_) to the sea. And as a general statement, that is true; but if he had imagined that the Rhone was running south-west at the point where Hannibal crossed it, he surely would have said that Hannibal marched north-east--he would not distinguish west and south-west in one sentence and confound east and north-east in the next. 35. According to Polybios (iii. 49. 5, 8–13) Hannibal marched in four days from the crossing of the Rhone to the so-called Island between the Rhone and the Scôras, found a civil-war in progress there, joined one faction in crushing the other, and obtained supplies from the successful faction as the price of his support. He must have crossed the Scôras and marched into the Island, as Polybios says “joined in attacking and expelling”--_synepithemenos kai synekbalôn_--which certainly implies that he did something more than make a demonstration from the other bank. And if the crossing over was comprised in the four days, the march may have been less than 40 Roman miles at 10 Roman miles a day: see paragraph 3.