It was Rome herself that soon crossed that barrier of the Alps which she had pronounced fixed by nature and insurmountable. Scarcely was she mistress of Cisalpine Gaul when she entered upon a quarrel with the tribes which occupied the mountain-passes. With an unsettled frontier, and between neighbors of whom one is ambitious and the other barbarian, pretexts and even causes are never wanting. It is likely that the Gallic mountaineers were not careful to abstain, they and their flocks, from descending upon the territory that had become Roman. The Romans, in turn, penetrated into the hamlets, carried off flocks and people, and sold them in the public markets at Cremona, at Placentia, and in all their colonies. The Gauls of the Alps demanded succor of the Transalpine Gauls, applying to a powerful chieftain, named Cincibil, whose influence extended throughout the mountains. But the terror of the Roman name had reached across. Cincibil sent to Rome a deputation, with his brother at their head, to set forth the grievances of the mountaineers, and especially to complain of the consul Cassius, who had carried off and sold several thousands of Gauls. Without making any concession, the Senate was gracious. Cassius was away; he must be waited for. Meanwhile the Gauls were well treated; Cincibil and his brother received as presents two golden collars, five silver vases, two horses fully caparisoned, and Roman dresses for all their suite. Still nothing was done. Another, a greater and more decisive opportunity offered itself. Marseilles was an ally of the Romans. As the rival of Carthage, and with the Gauls forever at her gates, she had need of Rome by sea and land. She pretended, also, to the most eminent and intimate friendship with Rome. Her founder, the Phocean Euxenes, had gone to Rome, it was said, and concluded a treaty with Tarquinius Priscus. She had gone into mourning when Rome was burned by the Gauls; she had ordered a public levy to aid towards the ransom of the Capitol. Rome did not dispute these claims to remembrance. The friendship of Marseilles was of great use to her. In the whole course of her struggle with Carthage, and but lately, at the passage of Hannibal through Gaul, Rome had met with the best of treatment there. She granted the Massilians a place amongst her senators at the festivals of the Republic, and exemption from all duty in her ports. Towards the middle of the second century B.C. Marseilles was at war with certain Gallic tribes, her neighbors, whose territory she coveted. Two of her colonies, Nice and Antibes, were threatened. She called on Rome for help. A Roman deputation went to decide the quarrel; but the Gauls refused to obey its summons, and treated it with insolence. The deputation returned with an army, succeeded in beating the refractory tribes, and gave their land to the Massilians. The same thing occurred repeatedly with the same result. Within the space of thirty years nearly