Gilbert,[35] the first bishop of Limerick, as has already been noted, was an Irishman. Indeed, we may venture to describe him as one of the most remarkable Irishmen of his time, in spite of the fact that the Annals pass him by in almost complete silence. He was at any rate a staunch supporter, or, as we should rather say, the leader of the Reformation movement in its earliest course. In a letter written in 1107 Anselm exhorted him, in virtue of their mutual friendship, to make good use of his episcopal office by correcting that which was amiss, and planting and sowing good customs, calling to aid him in the work his king (Murtough O'Brien), the other Irish bishops, and all whom he could persuade.[36] That, assuredly, Gilbert was forward to do. No sooner had he taken possession of his see than he began to organize a diocese. Its boundaries seem to have been fixed with care. It was exactly co-extensive with the modern diocese of Limerick, except on the north, where it stretched across the Shannon and included part of the present diocese of Killaloe.[37] Moreover he made the Church of St. Mary his Cathedral Church; indeed it is not unlikely that he built it to serve that purpose. A few years later he was appointed Legate of the Holy See. It is manifest that his new office gave him a unique opportunity of moulding the fortunes of the Irish Church. In Ireland Gilbert was now virtually the chief prelate and head of the Church. He was the representative and embodiment of the authority of the Holy See. The whole Romanizing party would naturally circle round him as their leader, and many waverers would be attracted to the new movement in the Irish Church, by the claim which he could make to speak in the name of the head of the Church Catholic. It was after he became legate, and no doubt in virtue of his legatine commission, that he issued a treatise which may be regarded as the programme of the Reformation. It is entitled _De Statu Ecclesiae_. Of this a fragment, including its earlier chapters, is still in our hands.[38] Before giving a slight summary of its contents I must mention that it is addressed "to the bishops and presbyters of the whole of Ireland," and that Gilbert declares that he wrote it at the urgent request of many of them. In this statement there may lurk an element of exaggeration. But behind it there lies at least so much truth as this. A considerable body of the clergy had approached the newly made legate, and requested his instruction regarding the proper constitution of the Church--for such is the subject of his tract; and that implies that the Romanizing movement was no longer in its infancy. There were many bishops and presbyters who had become dissatisfied with the old Irish method of Church government. They desired to bring it into conformity with that of the Roman Church. But they were in some uncertainty as to the nature of the changes that should be made, and so they asked Gilbert to give them authoritative counsel.