 According to Polybius the season was advanced had he went to Tarraco for the winter.The surviving fragments of Polybius on these events end here.In Livy a few days after the Battle of Baecula, when Scipio had descended from the pass of Castulo on his way to Tarraco, Hasdrubal Gisgo and Mago, came to join forces with Hasdrubal.