 These lasted from the reign of Áed Sláine to that of his two sons Diarmait and Blathmac (c. 599-665).The ""unam celebrationem"" of the first order and the ""diversas regulas"" of the second and third probably both refer to the Divine Office.The meaning seems to be that the first order celebrated a form of mass introduced by Patrick, who was the pupil of Germanus of Auxerre and Honoratus of Lerins, perhaps a Mass of the Gallican type.