Titus Livius (Livy), The History of Rome, Book 23
Frank Gardener Moore, Professor Emeritus in Columbia University, Ed.

28. Though this letter at first greatly stirred the senate, nevertheless, since concern for Italy was older and stronger, no change was made either in regard to Hasdrubal or to his forces. [2] But Himilco was sent with a complete army and an enlarged fleet to hold and defend Spain by land and sea. [3] After transporting his land and naval forces, Himilco fortified a camp, beached his ships and surrounded them with an earthwork. Then he himself with picked horsemen, making his way with all possible speed, and with equal alertness through the [p. 95]wavering and the hostile tribes, reached Hasdrubal.¹ [4] After setting forth the decrees and instructions of the senate, and being himself informed in turn how the war in Spain must be conducted, he went back to his own camp, being protected by his quickness more than anything else, since he had left each place before the enemy could agree upon action. [5] Hasdrubal, before breaking camp, exacted money from all the tribes under his rule, knowing well that Hannibal had repeatedly bought the right of passage, and that he had Gallic auxiliaries only by hiring them; [6] but that if he had set out on so long a march without funds, he would scarcely have made his way to the Alps. [7] Therefore he exacted money in haste and came down to the Hiberus.

When news of the decrees of the Carthaginians and Hasdrubal's expedition reached the Roman commanders, both dropped everything, and uniting their forces prepared to meet and resist his efforts, thinking [8??] that if Hannibal, who was himself an enemy Italy could scarcely endure, should be joined by Hasdrubal as a general and by an army from Spain, that would be the end of the Roman power. [9] Troubled by these apprehensions, they concentrated their troops at the Hiberus, crossed the river, and after protracted deliberation, whether to pitch camp near that of the enemy or to be satisfied with keeping him from his projected march by attacking [10??] allies of the Carthaginians, they prepared to attack a city which had its name Hibera from the river near by, the richest city of the region at that time. [11] On learning this Hasdrubal, instead of bringing aid to his allies, proceeded likewise to attack a city which had recently surrendered to the Romans. [12] Thus the siege [p. 97]already begun was abandoned by the Romans and² the war directed against Hasdrubal himself.