The "Life" here printed, which follows the Latin Life so closely that one seems a late translation of the other, is as far as the editor is aware, contained in a single MS. only. This is M. 23, 50, R.I.A., in the handwriting of John Murphy, "na Raheenach." Murphy was a Co. Cork schoolmaster, scribe, and poet, of whom a biographical sketch will be found prefixed by Mr. R. A. Foley to a collection of Murphy's poems that he has edited. The sobriquet, "na Raheenach," is really a kind of tribal designation. The "Life" is very full but is in its present form a comparatively late production; it was transcribed by Murphy between 1740 and 1750. It is much to be regretted that the scribe tells us nothing of his original. Murphy, but the way, seems to have specialised to some extent in saint's Lives and to have imbued his disciples with something of the same taste. One of his pupils was Maurice O'Connor, a scribe and shipwright of Cove, to whom we owe the Life of St. Ciaran of Saighir printed in "Silva Gadelica." The reasons of choice for publication here of the present Life are avowedly non-philological; the motive for preference is that it is the longest of the three Lives and for historical purposes the most important. The Life presents considerable evidence of historical reliability; its geography is detailed and correct; its references to contemporaries of Mochuda are accurate on the whole and there are few inconsistencies or none. Moreover it sheds some new light on that chronic puzzle--organisation of the Celtic Church of Ireland. Mochuda, head of a great monastery at Rahen, is likewise a kind of pluralist Parish Priest with a parish in Kerry, administered in his name by deputed ecclesiastics, and other parishes similarly administered in Kerrycurrihy, Rostellan, West Muskerry, and Spike Island, Co. Cork. When a chief parishioner lies seriously ill in distant Corca Duibhne, Mochuda himself comes all the way from the centre of Ireland to administer the last rites to the dying man, and so on. The relations of the people to the Church and its ministers are in many respects not at all easy to understand. Oblations, for instance, of themselves and their territory, &c., by chieftains are frequent. Oblations of monasteries are made in a similar way. Probably this signifies no more than that the chief region or monastery put itself under the saint's jurisdiction or rule or both. That there were other churches too than the purely monastic appears from offerings to Mochuda of already existing churches, v.g. from the Clanna Ruadhan in Decies, &c.