Muirchu, Memoir of St. Patrick, in Book of Armagh and in Tripartite Life, II, p. 269.
Ogam Alphabet in Book of Leinster, p. 38.
Ozanam, Frederic, Documents Inedits, containing extracts from Vita Sancti Donati Scotti Fesulani Episcopi, Paris, 1897.
Planctus Caroli, by an Irish Monk of Bobbio, Migne, P. L., 106.
Plummer, Charles. Vitae Sanctorum Hiberniae, 2 vols. Oxford, 1910.
Rule of St. Ailbe, ed. by Jos. O’Neill in Eriu, iii, pp. 92–109, from Brussels Codex, pp. 24 et seq.
Rule of St. Carthach, ed. by “Mac Eclaise” in Irish Ecclesiastical Record, May, 1910.
Rule of St. Comgall, ed. by John Strachan, in Eriu, i, 1904, in 3 MSS. Old Irish Metrical Rule not later than 800 A.D.
Riagul Chiarain, ed. by John Strachan, in Eriu, ii, pp. 227–228.
Riagul na Manach Liath, ibid., pp. 228–229.