Here we have the same Nennio, or Mo-nennius, called also Mancennus, to whom Enda is directed to go by his sister, and become his humble disciple. Rosnat was then and long after the great seminary of the early Northern Saints, before regular monasteries were founded at home; and hence Enda, a Northern Prince of Oriel, whose mother came from the Ards of Down, would naturally cross the narrow sea to the same great school which his countrymen frequented. In the _Tripartite Life of St. Patrick_, Manchan the Master is said to have accompanied the apostle to Tyrawley, when the chiefs and people of that district were converted about the year A.D. 449. Colgan says,[156] "that this Manchan the Master was the same person who elsewhere is called Mancennus of the Monastery of Rosnat, and that he received the name of Master from his great learning, especially in Theology and Sacred Scripture." The only point at issue seems to be whether Rosnat, the "Great Monastery," was in Galloway or Glen Rosyn[157] in Wales. It is difficult to fix the period when Enda went to study under the Master at Rosnat. It was probably about the year A.D. 475, for he was still a young man, and as he died very old, about A.D. 540, we may assume that he was born about A.D. 450, and would thus go to Britain between A.D. 470 and 480. From Rosnat, Enda, like Ninian and several other saints at the time, is said to have gone to Rome, and even to have founded somewhere in Italy a monastery called Laetinum or Latinum. But his sister, Fanchea, who loved him dearly, courageously followed him thither, and induced him to make her a promise that he would return home within a year; and this promise he fulfilled. He landed at Drogheda, which was probably at the time a portion of his father's kingdom of Oriel, and there he founded some churches after his return.