We agree with the learned and judicious Skene that the monastery of Rosnat, the _magnum monasterium_, which was also called _Alba_[187] and _Candida_, can be no other than Whiterne[188] in Galloway, or as it is sometimes called, Futerna. There is no doubt that St. Nennio, Nennius or Ninian, was the founder of that great monastery, and he may have been the teacher of some of the great saints from the north of Ireland, whose names are mentioned above. Furthermore it was through him and his great monastery that monastic life and discipline were introduced into those parts of Ireland, where these early saints, his disciples, founded their own establishments. St. Nennio or Ninian of Candida Casa was building his new stone church--the White House--in Galloway when he heard of the death of St. Martin of Tours, whose disciple he had been. Now, Martin died the 11th of November, A.D. 397; and it is manifestly out of the question to suppose that this Ninian, or Nennio, could have lived on to the year A.D. 570, when he would be at least 200 years of age. This assumes, however, the identity of Rosnat with Candida Casa. But if Rosnat were a Welsh monastery, and that Moinenn is merely another name for St. Manchan, or Manchenus, the Master, as some think; then Moinenn, Bishop of Clonfert, was very likely that person, and derived his training and knowledge of monastic discipline, at least to some extent, from that source. We have seen that St. Brendan spent some time in Wales, and that he belonged to the Second Order of Saints, which got a Mass from the three great Saints of Wales. As St. Moinenn had accompanied him in his voyages in the Atlantic, nothing is more likely than that he would also accompany him to Wales, and remain there until such time as Brendan founded Clonfert, when he was called home by the latter to take charge of this new and important foundation. It is evident, moreover, that he was a man of large culture, and that during his presidency over Clonfert he laid the foundations of that celebrity which the school subsequently attained.