Achieving little more on his first visit than a demonstration of the power of Rome, on his return, a few months later, with 30,000 men, including cavalry, he penetrated deeply inland, although it was not until nearly a century later that Britain became definitely a Roman province; and it was not until the reign of Vespasian at Rome and his deputy Julius Agricola in Britain that Roman vessels for the first time circumnavigated Great Britain and Scotland. The father-in-law of Tacitus, and himself an extremely able and far-sighted administrator, it was by Agricola that the earliest definite foundations of what was to become the British nation may be said to have been laid. Securing the confidence of the islanders, he not only encouraged amongst them the absorption of Roman {xiii} culture, but protected them against any excess of official exploitation; and, although he was presently recalled by the Emperor Domitian, the principles of administration that he had laid down were generally adopted and developed by his successors in office--forming, in many respects, those of that greater empire whose foundations were already being laid. It would be hard to exaggerate, indeed, the debt of the nations of British origin to the three and a half centuries of Roman rule, during which period the Christian religion was first preached in these islands. And, though it failed, if that had been its design, to create a strong and independent and self-governing colony--so that when the Roman power was finally withdrawn, owing to impending disasters at the core of the Empire, the Islanders became a prey, if not an easy one, to the next Saxon invaders--its legend of equity as between man and man, its perception and methods of development of natural resources, and its patient thoroughness of execution appealed to the minds and survived in the practice of every succeeding race of immigrants. That together with these qualities and those to be infused with the next current of invasion there was a real love of the sea among this early population has sometimes been doubted; and Ruskin in one of his essays seems definitely to deny this, adducing Chaucer as an argument. In this great poet of a later period, the first representative voice of emerging England, he finds no expression of it and indeed a positive aversion from all that the sea and sea-travel stood for. {xiv} But whether or not that be the case, and though there were undoubtedly periods, notably just before the rise of Alfred, wherein the nation as a whole, if it may so be spoken of, had largely forgotten the importance of sea-power, each of the three great tribes, who had then overrun the land, had depended for their success upon their maritime skill.