The second and third orders used partly Patrick's mass and partly one of British origin, and in the case of the third order Roman modifications were also introduced. The working of the "Catalogus" seems to imply that the first and second orders were Quartodecimans, but this is clearly not the meaning, or on the same argument the third order must have been partly Sextodecimans — if there were such things — and moreover we have the already mentioned statement of St. Wilfrid, the opponent of the Celtic Easter, at the Synod of Whitby, that such was not the case. Tirechan can only mean what we know from other sources: that the fourteenth day of the moon was the earliest day on which Easter could fall, not that it was kept on that day, Sunday or weekday. It was the same ambiguity of expression which misled Colman in 664 and St. Aldhelm in 704. The first and second orders used the Celtic tonsure, and it seems that the Roman coronal tonsure came partly into use during the period of the third order. After that we have an obscure period, during which the Roman Easter which had been accepted in South Ireland in 626-28, became universal, being accepted by North Ireland in 692, and it seems probable that a Mass on the model of the Carlsruhe and Piacenza fragments and the Stowe and Bobbio Missals - a Roman Canon with some features of a non-Roman type - came into general use. It was not until the 12th century that the separate Irish Rite, which, according to Gilbert, Bishop of Limerick (1106–39), was in use in nearly all Ireland, was abolished. Saint Malachy, bishop of Armagh (1134–48), began the campaign against it, and at the Synod of Cashel, in 1172, a Roman Rite ""juxta quod Anglicana observat Ecclesia"" was finally substituted. In Scotland there is very little information. Intercourse with Ireland was considerable and the few details that can be gathered from such sources as Adamnan's Life of St. Columba and the various relics of the Scoto-Northumbrian Church point to a general similarity with Ireland in the earlier period. Of the rite of the monastic order of the Culdees (Céli Dé or Goillidhe-Dé, servants of God, or possibly Cultores Dei) very little is known, but they certainly had a rite of their own, which may have been similar to the Irish.