Sertorius, however, resolving to send speedy relief, ordered two thousand skins to be filled with water, naming a considerable sum of money for the carriage of every skin; and many Spaniards and Moors undertaking the work, he chose out those who were the strongest and swiftest of foot, and sent them through the mountains, with order that when they had delivered the water, they should convey away privately all those who would be least serviceable in the siege, that there might be water sufficient for the defendants. As soon as Metellus understood this, he was disturbed, as he had already consumed most part of the necessary provisions for his army, but he sent out Aquinus with six thousand soldiers to fetch in fresh supplies. But Sertorius having notice of it, laid an ambush for him, and having sent out beforehand three thousand men to take post in a thickly wooded water-course, with these he attacked the rear of Aquinus in his return, while he himself, charging him in the front, destroyed part of his army, and took the rest prisoners, Aquinus only escaping, after the loss of both his horse and his armour. And Metellus, being forced shamefully to raise the siege, withdrew amidst the laughter and contempt of the Spaniards; while Sertorius became yet more the object of their esteem and admiration.
He was also highly honoured for his introducing discipline and good order amongst them, for he altered their furious savage manner of fighting, and brought them to make use of the Roman armour, taught them to keep their ranks, and observe signals and watchwards; and out of a confused number of thieves and robbers he constituted a regular, well-disciplined army. He bestowed silver and gold upon them liberally to gild and adorn their helmets, he had their shields worked with various figures and designs, he brought them into the mode of wearing flowered and embroidered cloaks and coats, and by supplying money for these purposes, and joining with them in all improvements, he won the hearts of all. That, however, which delighted them most was the care that he took of their children. He sent for all the boys of noblest parentage out of all their tribes, and placed them in the great city of Osca, where he appointed masters to instruct them in the Grecian and Roman learning. that when they came to be men, they might, as he professed, be fitted to share with him in authority, and in conducting the government, although under this pretext he really made them hostages. However, their fathers were wonderfully pleased to see their children going daily to the schools in good order, handsomely dressed in gowns edged with purple, and that Sertorius paid for their lessons, examined them often, distributed rewards to the most deserving, and gave them the golden bosses to hang about their necks, which the Romans called bullae.
There being a custom in Spain that when a commander was slain in battle, those who attended his person fought it out till they all died with him, which the inhabitants of those countries called an offering, or libation, there were few commanders that had any considerable guard or number of attendants; but Sertorius was followed by many thousands who offered themselves, and vowed to spend their blood with his. And it is told that when his army was defeated near a city in Spain, and the enemy pressed hard upon them, the Spaniards, with no care for themselves, but being totally solicitous to save Sertorius, took him upon their shoulders and passed him from one to another, till they carried him into the city, and only when they had thus placed their general in safety, provided afterwards each man for his own security.
Nor were the Spaniards alone ambitious to serve him, but the Roman soldiers, also, that came out of Italy, were impatient to be under his command; and when Perpenna Vento, who was of the same faction with Sertorius, came into Spain with a quantity of money and a large number of troops, and designed to make war against Metellus on his own account, his own soldiers opposed it, and talked continually of Sertorius, much to the mortification of Perpenna, who was puffed up with the grandeur of his family and his riches. And when they afterwards received tidings that Pompey was passing the Pyrenees, they took up their arms laid hold on their ensigns, called upon Perpenna to lead them to Sertorius, and threatened him that if he refused they would go without him and place themselves under a commander who was able to defend himself and those that served him. And so Perpenna was obliged to yield to their desires, and joining Sertorius, added to his army three-and-fifty cohorts.