YEAR.—DISTRICT AFFECTED BY THE CHANGE:[130]
| 630 A.D. | South of Ireland. |
| 664 | Northumbria converted by Irish missionaries from Iona. |
| 692 | North of Ireland. |
| 705 | East Devon and Somerset, the Celts under Wessex. |
| 710 | The Picts of Scotland. |
| 716–718 | Iona. |
| 721 | Strathclyde, the South-west of Scotland. |
| 768 | North Wales. |
| 777 | South Wales. |
| 909 | Parts of Cornwall. |
EFFECT OF THE EASTER CONTROVERSY ON EDUCATION:
The Irish monks who visited the Continent, as well as the adherents of the Roman usage in Britain, advocated and even urged the necessity of conforming to the Continental practices, but their compatriots did not yield without a struggle. As we have shown, certain parts of Britain in which the Celtic Church held sway were even more reluctant to give up the traditional usages. So far as the general interests of education are concerned this controversy had a somewhat harmful effect. It diverted the attention of scholars from matters of greater moment and created a certain prejudice against those Irish teachers who were not prepared to give up the cherished customs of the founders of their monasteries. For example, after the Synod of Whitby in 664 A.D. when Celtic usage was abolished, St. Colman and a number of Anglo-Saxon followers retired from Lindisfarne and founded a monastery on Inisbofinn, an island off the west coast of Ireland. It must not, however, be assumed that the Irish influence in England ceased with the departure of St. Colman and his followers. At the Synod of Whitby some of the most vigorous advocates of the Roman usage were Irishmen, while amongst the Anglo-Saxons there were many champions of the Celtic usage.[131] For at least thirty years after the Synod of Whitby the Irish influence was felt. A native ministry having been trained the Irish monks had accomplished their work.[132] In one respect the Easter controversy had a good effect on learning. It led to a careful study of the computation and astronomy and created the necessity of becoming familiar with all the classical and ecclesiastical literature which was calculated to throw any light on that vexed question. The consequence of this study was that the Irish monks became the greatest astronomers of the seventh, eighth and ninth centuries. It is enough to read the Paschal Epistle of Cummian Fada (d. 661)[133] or the famous letter of Dungal who in 810 A.D. was asked by Charles the Great to explain the double eclipse of the sun which was supposed to have occurred in that year,[134] to be convinced of the superiority of their scholarship.
ORGANIZATION OF THE IRISH MONASTERY ON A TRIBAL BASIS:
In marked contrast with the other Western churches which were organized on a national and episcopal basis the Irish Church was tribal and monastic. This was quite natural. The conversion of the chieftain was followed by the conversion of the clansmen and a tribal character was thus given to the nascent church.[135] At an early date the Irish Church took a monastic form which accorded so well with the native social system. The abbot became chief of an ecclesiastical clan most of whose members were descended from the same common ancestor as the abbot himself. No wonder the native name for the monastic community was muintir, usually translated familia.[136] Even the successor of the abbot—the coarb, literally heir—could often claim lineal descent from the same chieftain as the abbot whom he succeeded. Of course, as the abbot was unmarried, there could be no direct lineal succession from the first abbot, but there was a succession in the manner indicated. There was thus a close resemblance between the succession of the abbot and that of the chieftain. The successor of the chieftain was not necessarily his son, but a member of the clan by whom he was selected on account of his personal fitness for the position. In the case of the monastery of Iona it has been noted that Columba and thirteen of his successors were descended from a common ancestor, an Irish chief named Conall Gulban.[137] The monastic family consisted of fratres: those of tried devotion were called seniores; those who were strong for labour were operarii fratres; and those under instruction were juniores, alumni, or pueri familiares. Besides the congregation—collectio—of professed members there were usually present peregrini, sometimes called proselyti, poenitentes, or hospites whose sojourn was of varied duration.[138]
The number of officers was relatively small, the more important being the abbot, the prior, the episcopus, the scriba, and the Erinach or Airchinneach. The abbot was the superior of the monastic family and frequently had several houses under his supreme control. He generally lived at the mother house. The branch houses were governed by local superiors called priors who were subject to removal by the abbot. There was also a prior at the mother house who assisted the abbot and took his place in administration when his superior was absent. The prior in this latter capacity is sometimes styled custos monasterii, sometimes oeconomus, and in the Irish Annals, Fertighis.[139]
An interesting fact in connection with the Irish monastic organization is that the abbot was not necessarily a bishop.[140] In matters of discipline and jurisdiction the abbot was supreme whether he was a bishop or not. But if he were not a bishop there were certain duties which he could not perform. The bishop (episcopus) as such and in virtue of his office performed such functions as administration of Confirmation and Holy Orders just as at present. Of course the abbot was frequently a bishop and consequently was vested with correspondingly increased powers.[141]