At this period the Carthaginians were masters of the whole Mediterranean coast of Libya from the Altars of Philaenus, opposite the Great Syrtis, to the Pillars of Hercules, a seaboard of over sixteen thousand stades. They had also crossed the strait of the Pillars of Hercules, and got possession of the whole seaboard of Iberia on the Mediterranean as far as the Pyrenees, which separate the Iberes from the Celts—that is, for a distance of about eight thousand stades: for it is three thousand from the Pillars to New Carthage, from which Hannibal started for Italy; two thousand six hundred from thence to the Iber; and from that river to Emporium again sixteen hundred; from which town, I may add, to the passage of the Rhone is a distance of about sixteen hundred stades; for all these distances have now been carefully measured by the Romans and marked with milestones at every eighth stade. After crossing the river there was a march up stream along its bank of fourteen hundred stades, before reaching the foot of the pass over the Alps into Italy. The pass itself was about twelve hundred stades, which being crossed would bring him into the plains of the Padus in Italy. So that the whole length of his march from New Carthage was about nine thousand stades, or 1125 Roman miles. Of the country he had thus to traverse he had already passed almost half in mere distance, but in the difficulties the greater part of his task was still before him.