First, let us note the prominence which is given to Limerick, the diocese of Gilbert, the president of the Synod. Usually a diocese is somewhat vaguely defined by four places on its borders. But here no less than thirteen are named. So full are the indications that a fairly exact map of the diocese could be drawn. Further, in this diocese alone mention is made of a Cathedral Church: "The Church of Mary in Limerick is its principal church."[56] Note the present tense: "The Church of Mary is"—not shall be—"its principal church." We remember that Gilbert insisted in the De Statu Ecclesiae that a diocese should have a "pontifical church." Again, the boundaries of this one diocese are protected by a clause which has no parallel elsewhere: "Whosoever shall go against these boundaries goes against the Lord, and against Peter the Apostle, and St. Patrick and his coarb and the Christian Church." Who but the legate of the Pope would have thus invoked St. Peter?

Surely this portion of the ordinances of the Synod must have been penned by Gilbert himself. And the whole passage—by the minuteness of its description of the diocese, by the strength of the terms in which it is expressed, by the reference to the Cathedral Church as already existing—suggests that the diocese was formed and organized before the Synod met, as I have already assumed. We may even suspect that an attempt had been made to invade it, which Gilbert stoutly resisted, relying on his legatine authority.

In the list of dioceses there is an omission which demands explanation. No mention whatever is made of Dublin, the oldest diocese in Ireland. Not only so; the northern limit of the diocese of Glendalough is marked by Lambay Island and Greenogue, which lies due west of it in the County Meath. Thus the diocese of Glendalough, as contemplated by the Synod—and, it may be added, as it was in fact forty years later[57]—included the whole of the actually existing diocese of Dublin. The Danish Christians of Dublin and their Irish bishop are treated as interlopers; they are absolutely ignored. It may be said that this was due to the mutual hostility which divided the diocese of Dublin from the native Church, and to the fact that the bishops of Dublin had always been subject to Canterbury. But it is not enough to say this; for the estrangement of Dublin from the Irish is the very thing that has to be accounted for.

It had its root in the growing prosperity of the Danish city. The Irish had no towns. Town life was introduced among them by the Norsemen. And of their towns Dublin was always the chief. By this time it had become so important that it had good right to be called the metropolis of the country. And its citizens were thoroughly aware of this. As early as 1074 the burgesses of Dublin and their bishop, Patrick, claimed for it that title.[58] Now in all reason a metropolis should have a metropolitan as its bishop; and no doubt the bishops of Dublin thought themselves de facto, if not de jure, superior to the other bishops of Ireland. In fact we find one of them playing the archbishop. We have two interesting letters of Anselm, written apparently about 1100. One of them is addressed to Malchus, bishop of Waterford, directing him to rebuke Samuel O'Hanley, bishop of Dublin, for various irregularities, in particular for having his cross carried before him like an archbishop; the other is addressed to Samuel himself, and complains of the same actions.[59] These proceedings are not likely to have been brought to an end by Anselm's letters; and we may assume that they were continued as long as Samuel held the see of Dublin. It was but natural that Cellach should strongly resent them, for they were disrespectful both to himself and to the archbishop of Cashel. We are not surprised, therefore, to find that on the death of Samuel in 1121, eleven years after Rathbreasail, Cellach tried to get possession of the Church of Dublin,[60] most probably with the intention of bringing it under the jurisdiction of the bishop of Glendalough. Nor are we surprised that the men of Dublin at once replied by electing another bishop and bidding Ralph of Canterbury to consecrate him if he desired to retain the suffragan see which they had so long preserved for him.[61] We shall see hereafter how the bishops of Dublin were at length induced to look with favour on the Irish Church. Meanwhile we learn that they were not very obedient suffragans of Canterbury; and we cease to wonder that they were ignored in the Rathbreasail decrees.

Another feature of the canons of the Synod is worth noting. In several instances the see of a diocese was not absolutely fixed. Two places were named, and it was apparently left to the bishop of the future to select that one of the two which he preferred to be his city. Thus we have a diocese of Derry or Raphoe, a diocese of Connor or Down, another of Wexford or Ferns, and so forth. The meaning of this is best seen by taking a single example. To one of the dioceses of Munster was assigned the area now occupied by the two dioceses of Waterford and Lismore. It consisted of the original Danish diocese of Waterford, together with a much more extensive non-Danish area. Alternative sees were named; it was described as the parish of Lismore or Waterford. Now Lismore was the most sacred spot in the enlarged diocese. It was the site of a monastery founded by St. Mochuta. It was an ideal place for a bishop's see. But it was doubtless ruled at the moment by an abbot, the coarb of Mochuta. Unless he was prevailed on to accept episcopal orders, or was deprived of his authority, a diocesan bishop could not be established there. On the other hand, Waterford had no sacred traditions; but it was already the see of a diocese. In default of Lismore it would be a convenient place for the see. Between Lismore and Waterford the circumstances of the future must decide. Ultimately, it appears, Malchus retired from the archbishopric of Cashel, and became bishop of his older diocese, now so much greater than it had been. He placed his stool, however, not at Waterford but at Lismore.[62] A similar, but not always identical course was followed in other such cases.

What the Synod of Rathbreasail actually accomplished was this. It gave to Ireland a paper constitution of the approved Roman and Catholic type. But by doing this it had not achieved the purpose of its existence. In the years that followed, its enactments had to be carried into effect. And here was the real crux. Before the Church came to be ruled by diocesan bishops, the existing rulers—the coarbs of church founders—must be dispossessed of their authority; the numerous bishops of the old Irish type must be got rid of; the jurisdiction of the new bishops must be fixed by common consent, or enforced without it; and revenues must be provided for them. A mere synodal decree could not accomplish all this. The diocesan system could become a fact throughout the whole Church, and the last vestiges of the ancient constitution be made to disappear, only after determined effort, and probably bitter contention. And when all was done it would certainly be found that the scheme of dioceses arranged at Rathbreasail had been largely departed from.

I can best illustrate the nature of the difficulties which had to be encountered, and the length of time which might be required to overcome them, by giving a short outline of the history of the forming of the dioceses of the kingdom of Meath.

In Meath, as we have seen, there were dioceses ruled by bishops before Rathbreasail. But these dioceses were of small size. It may be doubted whether most of them fulfilled the condition laid down by Gilbert, that a bishop should have not less than ten churches within his jurisdiction. They had therefore to be grouped under a smaller number of prelates. What had to be accomplished in this case was not so much the clipping of the wings of the abbots, as the extirpation of the more recently appointed diocesan bishops. The Synod determined that the kingdom should be divided into two dioceses, one in the west, the other in the east. The western see was to be at Clonard, at the moment, as it seems, the see of O'Dunan, and famed as the site of the great monastery of St. Finnian, founded in the sixth century; the eastern see was to be at Duleek, near Drogheda. Now a few months after the Synod of Rathbreasail there was held at Usnagh a local synod of the men of Meath, at which the king and many notable persons were present.[63] This synod ordained that the parishes of Meath should be equally divided between the bishops of Clonmacnoise and Clonard. It will be observed that the principle of the Rathbreasail decree was accepted, that there should be two, and only two, dioceses in Meath. But the change made in the sees is significant. The Synod of Rathbreasail intended that Clonard should be the see of the western diocese, which would include Clonmacnoise. The Synod of Usnagh demanded that Clonmacnoise, founded by one of the most noted of Irish saints, St. Ciaran, should be one of the surviving sees, and that Clonard should be the see, not of the western, but of the eastern half of the kingdom. Thus the Synod of Rathbreasail was at once met with strenuous and, as it proved, successful opposition in Meath.

And here I may mention another fact. A few years after the Synod we have proof of the existence of a diocese in the north of the kingdom, which has not hitherto been mentioned, and which is not named in the Rathbreasail canons. We know it as the diocese of Kilmore.[64] It may have been one of O'Dunan's dioceses, or it may have been founded later. One thing is certain. The diocese formed the territory of a strong tribe. Consequently it had in it the element of stability. It was never suppressed: it exists to this day. So far as it was concerned the canons of Rathbreasail were a dead letter from the beginning.

But let us return to Clonard. It was the business of its successive bishops, in accordance with the decrees of Usnagh, to annex the small neighbouring bishoprics of east Meath. They had considerable success. We possess a list of churches granted by Eugenius, the last Irish bishop of Clonard, to the monastery of St. Thomas the Martyr, Dublin.[65] They are scattered over the three deaneries of Dunshaughlin, Skreen and Trim. Thus Eugenius had absorbed into his diocese the bishoprics of those three places. Another document tells us that this same Eugenius consecrated the church of Duleek;[66] which implies that the diocese of Duleek was also suppressed. Thus by 1191, the year of Eugenius's death—within eighty years of the Synod of Rathbreasail, and before the Anglo-Normans had captured the ecclesiastical domination of Meath—the diocese of Clonard had expanded to four times its original size. Its bishop ruled the whole area of the modern county of Meath which lies south of the Boyne and Blackwater.