Strabo Geography 4.1.13

[13] But the Tectosages dwell near to the Pyrenees, bordering for a small space the northern side of the Cevennes; ¹ the land they inhabit is rich in gold. It appears that formerly they were so powerful and numerous, that dissensions having arisen amongst them, they drove a vast multitude of their number from their homes; and that these men associating with others of different nations took possession of Phrygia, next to Cappadocia, and the Paphlagonians. Of this those who are now called the Tectosages afford us proof, for [Phrygia contains] three nations, one of them dwelling near to the city of Ancyra, ² being called the Tectosages; the remaining two, the Trocmi and Tolistobogii. ³ The resemblance these nations bear to the Tectosages is evidence of their having immigrated from Keltica, though we are unable to say from which district they came, as there does not appear to be any people at the present time bearing the name of Trocmi or Tolistobogii, who inhabit either beyond the Alps, the Alps themselves, or on this side the Alps. It would seem that continual emigration has drained them completely from their native country, a circumstance which has occurred to many other nations, as some say that the Brennus, who led an expedition to Delphi, ⁴ was a leader of the Prausi; but we are unable to say where the Prausi formerly inhabited. It is said that the Tectosages took part in the expedition to Delphi, and that the treasures found in the city of Toulouse by the Roman general Caepio formed a portion of the booty gained there, which was afterwards increased by offerings which the citizens made from their own property, and consecrated in order to conciliate the god. ⁵ And that it was for daring to touch these that Caepio terminated so miserably his existence, being driven from his country as a plunderer of the temples of the gods, and leaving behind him his daughters, who, as Timagenes informs us, having been wickedly violated, perished miserably. However, the account given by Posidonius is the more credible. He tells us that the wealth found in Toulouse amounted to somewhere about 15,000 talents, a part of which was hidden in the chapels, and the remainder in the sacred lakes, and that it was not coined [money], but gold and silver in bullion. But at this time the temple of Delphi was emptied of these treasures, having been pillaged by the Phocaeans at the period of the Sacred war and supposing any to have been left, it would have been distributed amongst many. Nor is it probable that the Tectosages returned home, since they came off miserably after leaving Delphi, and owing to their dissensions were scattered here and there throughout the country; there is much more likelihood in the statement made by Posidonius and many others, that the country abounding in gold, and the inhabitants being superstitious, and not living expensively, they hid their treasures in many different places, the lakes in particular affording them a hiding-place for depositing their gold and silver bullion. When the Romans obtained possession of the country they put up these lakes to public sale, and many of the purchasers found therein solid masses of silver. In Toulouse there was a sacred temple, held in great reverence by the inhabitants of the surrounding country, and on this account loaded with riches, inasmuch as there were many who offered gifts, and no one dared to touch them.