Peace being restored, Agricola now directed his attention to a better administration of the province, and to the introduction of those measures most likely to lead to the consolidation of the Roman power and the quiet submission of the inhabitants of the province. Justice and moderation were the characteristics of his government. An equal administration of the laws, and the removal of those burdens and exactions which pressed most heavily upon the natives, could not but in time have the desired effect. [Sidenote: A.D. 79. Second Campaign of Agricola; over-runs districts on the Solway.] As soon as the summer of the next year arrived, Agricola proceeded to carry into execution his deliberately-formed plan for the subjugation of the northern tribes who had hitherto maintained their independence, and, indeed, had not as yet come into hostile collision with the Roman power in Britain. He appears to have directed his course towards the Solway Firth, and slowly and steadily penetrated into the wild country which stretches along its northern shore, and brought the tribes which possessed it under subjection.[43] These tribes seem to have formed part of the great nation of the Brigantes, a portion of whose territories had remained unsubdued by his predecessor Petilius Cerealis. He surrounded the subjugated tribes with forts and garrisons, and the remains of the numerous Roman camps and stations, which are still to be seen in this district, comprising the counties of Dumfries, Kirkcudbright, and Wigtown, attest the extent to which he had penetrated through that country and garrisoned it with Roman troops. Between the hills which bound Galloway and Dumfriesshire on the north and the Solway Firth on the south, the remains of Roman works are to be found in abundance from the Annan to the Cree, and surround the mouth of every river which pours its waters into that estuary.[44] The great and extensive nation of the Brigantes was now entirely included within the limits of the Roman province; and Agricola saw before him a barren and hilly region which divided it from the northern tribes, still comparatively unknown except by name to the Romans, and with whom their arms had not yet come in contact. The following winter was devoted to reducing the turbulent character of the nations recently added to the province to the quiet submission of provincial subjects. The policy adopted was the effectual one of introducing a taste for the habits and pleasures of civilised life. He encouraged them to build temples, courts of justice, and houses of a better description. He took measures for the education of the young. The natives soon began to study the Roman language and to adopt their dress, and by degrees acquired a taste for the luxurious and voluptuous life of the Romans, of which the numerous remains of Roman baths which have been discovered within the limits of the Brigantian territory afford no slight indication.[45]