Redigerer Keltisk kristendom (avsnitt)

===Primære kilder ===
* Adomnan: ''Life of Columba'', red. A. O. and M. O. Anderson, 2. utgave (Oxford Medieval Texts, 1991)
* ''Annales Cambriae'', red. Rev. John Williams ab Ithel (London : Longman, Green, Longman and Roberts, 1860)
* Bede: ''Historiam Ecclesiasticam Gentis Angelorum'', i Venerabilis Baedae Opera Historica. ed. C. Plummer (Oxford, 1896)
* Cummian: ''De controversia paschali'' & ''De ratione conputandi'', red. Maura Walsh & Dáibhí Ó Cróinín (Toronto: Pontifical Institute of Mediaeval Studies, 1988), ss. 93-5.
* Gildas: ''De Excidio Brittaniae'', red. J. A. Giles, Six Old English Chronicles (London, 1848)
* ''Historia Brittonum'', red. J. A. Giles, Six Old English Chronicles (London, 1848)
* ''Medieval Handbooks of Penance'', red. J. T. McNeill & H. M. Gamer (New York: Columba University Press, 1939) 
* Patrick (helgen): ''Confessio'', red. og overs. John Skinner (Image, 1998)