“This was of service to them in their quest of gold, but it did harm to the cultivators of the plains below, who were being deprived of the means of irrigation, since the river was not able to water their land from the others having possession of the stream in its upper course. From this cause there were incessant wars between the two peoples. But when the Romans got the mastery the Salassi were expelled from the gold-mines and from their territory, but still being in possession of the mountain, they used to sell the water to the farmers who had hired the gold-mines, and with whom there were constant quarrels because of the grasping conduct of the contractors[126].” This passage shows plainly that for a very long period before the Roman Conquest the Salassi had not merely worked the gold of their mountains, but had attained to very considerable engineering skill in so doing. Further, in this region have been found gold coins bearing the inscriptions _Prikou_, etc. in one of the North Etruscan alphabets. These coins were most probably struck by the Salassi, who were probably not Kelts, but a remnant of the ancient Rhaetian stock[127]. Passing northwards by the Pennine Alps, the regular road in ancient days from Italy into Switzerland, into the valley of the Rhone, the so-called _Vallis Poenina_, the modern Canton of Valais, we come to the Helvetii, whom Posidonius of Apamea, the famous Stoic philosopher who travelled in Western Europe about 100-90 B.C., describes as “wealthy in gold.” This gold was probably derived from the same Alpine region. The Helvetii struck both silver coins in imitation of the silver coins of Massalia with the Lion type, and gold ones after the type of Philip’s staters. We may now pass on to Gaul Proper, many peoples of which were famous for their wealth, especially the Arverni, who have left their name in Auvergne, and the Tectosages, whose chief town was Tolosa (Toulouse). The former, whose original home was on the upper waters of the Loire, probably had no gold in their native mountains (for if they had, Strabo would hardly have failed to mention it), but in the second century B.C. they became the most powerful state of Central and Southern Gaul, for “they extended their dominion even as far as Narbo (Narbonne) and the borders of the territory of Massalia (Marseilles), and they likewise had the control of all the tribes as far as the Pyrenees, and as far as the Ocean and the Rhine. And it is said that Luerius, the father of Bituitus, who fought against Maximus and Domitius (121 B.C.), came to such a pitch of wealth and luxury that on one occasion, making a display of his riches to his friends, he drove on a waggon through a plain sowing broadcast gold and silver coin, while his friends followed him gathering it up[128].” It was the Arverni who first[129] struck gold coins in imitation of the gold staters of Philip II., a fact explained by the passage just quoted, which shows that their empire extended up