First of all the new general found employment in Gaul, where no formal insurrection had broken out, but serious disturbances of the peace had occurred at several places; in consequence of which Pompeius deprived the cantons of the Volcae-Arecomici and the Helvii of their independence, and placed them under Massilia. He also laid out a new road over the Cottian Alps (Mont Genevre,(21)), and so established a shorter communication between the valley of the Po and Gaul. Amidst this work the best season of the year passed away; it was not till late in autumn that Pompeius crossed the Pyrenees. Appearance of Pompeius in Spain Sertorius had meanwhile not been idle. He had despatched Hirtuleius into the Further province to keep Metellus in check, and had himself endeavoured to follow up his complete victory in the Hither province, and to prepare for the reception of Pompeius. The isolated Celtiberian towns there, which still adhered to Rome, were attacked and reduced one after another; at last, in the very middle of winter, the strong Contrebia (south-east of Saragossa) had fallen. In vain the hard-pressed towns had sent message after message to Pompeius; he would not be induced by any entreaties to depart from his wonted rut of slowly advancing. With the exception of the maritime towns, which were defended by the Roman fleet, and the districts of the Indigetes and Laletani in the north-east corner of Spain, where Pompeius established himself after he had at length crossed the Pyrenees, and made his raw troops bivouac throughout the winter to inure them to hardships, the whole of Hither Spain had at the end of 677 become by treaty or force dependent on Sertorius, and the district on the upper and middle Ebro thenceforth continued the main stay of his power. Even the apprehension, which the fresh Roman force and the celebrated name of the general excited in the army of the insurgents, had a salutary effect on it. Marcus Perpenna, who hitherto as the equal of Sertorius in rank had claimed an independent command over the force which he had brought with him from Liguria, was, on the news of the arrival of Pompeius in Spain, compelled by his soldiers to place himself under the orders of his abler colleague.