The conversion of a Pagan people to Christianity must always be a primary fact in their history. It is not merely for the error it abolishes or the positive truth it establishes that a national change of faith is historically important, but for the complete revolution it works in every public and private relation. The change socially could not be greater if we were to see some irresistible apostle of Paganism ariving from abroad in Christian Ireland, who would abolish the churches, convents, and Christian schools; decry and bring into utter disuse the decalogue, the Scriptures and the Sacraments; efface all trace of the existing belief in One God and Three Persons, whether in private or public worship, in contracts, or in courts of law; and instead of these, re-establish all over the country, in high places and in every place, the gloomy groves of the Druids, making gods of the sun and moon, the natural elements, and man's own passions, restoring human sacrifices as a sacred duty, and practically excluding from the community of their fellows, all who presumed to question the divine origin of such a religion. The preaching of Patrick effected a revolution to the full as complete as such a counter-revolution in favour of Paganism could possibly be, and to this thorough revolution we must devote at least one chapter before going farther. The best accounts agree that Patrick was a native of Gaul, then subject to Rome; that he was carried captive into Erin on one of King Nial's returning expeditions; that he became a slave, as all captives of the sword did, in those iron times; that he fell to the lot of one Milcho, a chief of Dalriada, whose flocks he tended for seven years, as a shepherd, on the mountain called Slemish, in the present county of Antrim. The date of Nial's death, and the consequent return of his last expedition, is set down in all our annals at the year 405; as Patrick was sixteen years of age when he reached Ireland, he must have been born about the year 390; and as he died in the year 493, he would thus have reached the extraordinary, but not impossible age of 103 years. Whatever the exact number of his years, it is certain that his mission in Ireland commenced in the year 432, and was prolonged till his death, sixty-one years afterwards. Such an unprecedented length of life, not less than the unprecedented power, both popular and political, which he early attained, enabled him to establish the Irish Church, during his own time, on a basis so broad and deep, that neither lapse of ages, nor heathen rage, nor earthly temptations, nor all the arts of Hell, have been able to upheave its firm foundations. But we must not imagine that the powers of darkness abandoned the field without a struggle, or that the victory of the cross was achieved without a singular combination of courage, prudence, and determination—God aiding above all.