It was in 851 that he published his famous work on "Predestination." Long before that time, however, his name was well known in France, so that it may be safely assumed that he came to that country about the year 845. At this calculation we may place his birth somewhere about the year 820. Prudentius, his colleague in the Scolia Palitina, or Royal School of Paris, says that he was the cleverest of all those whom Ireland sent to France. _Te solum omnium acutissimum galliæ transmisit Hibernia._ When we consider that Prudentius was so intimately connected with him as to style himself his "_quasi frater_," any doubts that might remain as to Erigena's nationality should entirely vanish. But, it may be asked, why did this great man leave Ireland to seek shelter and patronage from a foreign king? Had he not at home a field wide and fertile enough for even his towering intellect in the numerous monasteries and schools which were at this time the pride and glory of Erin? The cause of his departure from his home and friends was probably the inroads of the Danes, who, in the year 843, under their brutal leader Turgesius, "plundered Connaught, Meath and Clonmacnoise with its oratories," and thus rendered a residence in the country anything but desirable for the holy monk and erudite scholar. We have seen that John published his work "De Prædestinatione" about the year 851. In combating the errors of Gottschalk, he unfortunately broached new errors of his own, and thus incurred the displeasure of the Holy See. The most precious volume in the Royal Library at Paris was a Greek copy of the works of "Pseudo Dionysius the Areopagite." Many unsuccessful attempts had been made to translate this work, and when Charles the Bald found that the erudite rector of the Royal School could translate Greek, he ordered him to furnish a translation which he did. It was published in 861, and a copy sent to Pope Nicholas I. The Sovereign Pontiff, who was not inclined to look with great favor on the author of "De Prædestinatione," did not approve of the translation, and as a consequence of some farther negotiations between Charles and the Holy See, Scotus was, in 861, dismissed from his position in the Scolia Palitina. He did not, however, just then cease to be connected with the Royal Palace. His principal works are--"De Divisione Naturæ," "Liber de Divine Prædestinatione," Translation of the Ethics of Aristotle and of the writings of "Pseudo Dionysius the Areopagite," and a "Commentary on the Gospel of St. John." That John Scotus Erigena erred and erred gravely, no one can for a moment deny; but we should remember with the learned and distinguished Coadjutor Bishop of Clonfert (the Most Rev. Dr. Healy), "That he erred not in the spirit of Luther and Calvin, but of Origen and St. Cyprian."