 It lasted from the end of the reign of Tuathal to that of Áed mac Ainmuirech (c. 544-99).They had one head, Christ, they celebrated different Masses and different rules (""diversas regulas""), they had one Easter, the fourteenth of the moon after the equinox, and one tonsure from ear to ear.They received a Mass from the Britons, David of Wales, Gilla (Gildas), and Docus (Cadoc).