Religion of the Ancient Celts, p. 345
Folk-lore as an Historical Science, p. 129.
Western France, vol. ii.
See Le Braz, La Légende de la Mort, t. i, p. 39, t. ii, pp. 37 ff.; Albert Le Grand, Vies des Saints de la Bretagne, p. 63; Villemarqué, Chants populaires, pp. 38 ff.
See MacCulloch, Religion of the Ancient Celts, p. 372 and notes.