In 1175, on the death of their abbot the monks of Iona elected Flathbert; but he felt that the shadows of death were gathering round him, and he would not leave his own monastery of Derry. He died the same year, and "was buried in the monastery, leaving a great reputation for wisdom and liberality;" but before his death he had the pleasure of knowing that "1175, Donough O'Carolan perfected a treaty of friendship with the abbey and town, and gave to the abbey a betagh townland of Donoughmore and certain duties." Some years before his death Flathbert had resigned the See of Derry in favor of Dr. Muredach O'Coffey,[3] who, having been consecrated bishop of Ardstraw had, in 1150, transferred that See to Maghera or Rathlure, thus uniting Ardstraw and Rathlure. His accession to Derry joined the three into one, to which under Dr. O'Carolan in the next century, Innishowen was added, thus forming the modern diocese. Dr. O'Coffey took up his residence in the abbey where, on the 10th of February, 1173, he breathed his last. Archdall in his Monasticon calls him "St. Muredach;" but the old Annalists content themselves with saying that "he was the sun of science, the precious stone and resplendent gem of knowledge, the bright star and rich treasury of learning; and as in charity so, too, was he powerful in pilgrimage and prayer." The Masters add that "a great miracle was performed on the night of his death; the dark night was illumined from midnight to day-break; and the neighboring parts of the world which were visible were in one blaze of light; and all persons arose from their beds imagining it was day." But I must now hasten to the end, for there is little in the history of the next four centuries over which one loves to linger. The story it tells is the old one of robberies and murders and burnings. It records the first rumblings of that storm so soon to break over that land and make of our island a vast coliseum, drenching it with the blood of martyrs. I have often thought what a pang it must have cost the heart of Brother Michael Oblery to pen such entries as these: "1195, Rury, son of Dunlere, chief of Ulidia, plunders Derry-Columbkille with an English force." "1197, Sir John De Courcy plunders the abbey of Derry." "1198, Sir John De Courcy again plunders Derry abbey."