Cork college was founded by St. Finnbarr towards the end of the sixth century. One of its professors, Colman O'Cluasaigh, who died in 664, wrote the curious Irish hymn or prayer mixed with Latin, preserved in the Book of Hymns.[26] The place was burned four times between 822 and 840, but in the twelfth century the ancient monastery which had fallen into decay was rebuilt by Cormac Mac Carthy, king of Munster, and builder of the celebrated Cormac's Chapel at Cashel. The school of Ross was founded by St. Fachtna for the Ithian tribes[27] of Corca Laidhi [Cor-ka-lee] in South-west Munster. Ross is frequently referred to in the Annals up to the tenth century. There is extant an interesting geographical poem in Irish, of 136 lines, written by one of the teachers there in the tenth century, and apparently intended as a kind of simple text to be learned by heart by the students.[28] Ross was plundered by the Danes in 840, but appears to have been flourishing until North-west Munster was laid waste by the Anglo-Normans under FitzStephen, after which no more is heard of its schools or colleges. Innisfallen was founded upon an exquisite site on the lower lake of Killarney by St. Finan.[29] The well-known "Annals of Innisfallen," preserved in the Bodleian Library, were probably written by Maelsuthain [Calvus Perennis] O'Carroll, the "soul-friend" of Brian Boru, who inserted the famous entry in the Book of Armagh.[30] It is probable that Brian himself was also educated there. This monastery, owing to its secure retreat in the Kerry mountains, appears to have remained unplundered by the Norsemen, and to have been accounted "a paradise and a secure sanctuary." Iniscaltra is a beautiful island in the south-west angle of Loch Derg, between Galway and Clare, still famous for its splendid round tower. It was here Columba of Terryglass, who died in 552, established a school and monastery which became so famous that in the life of St. Senan seven ships are mentioned as arriving at the mouth of the Shannon crowded with students for Iniscaltra. It was this Columba who, when asked by one of his disciples why the birds that frequented the island were not afraid of him, made the somewhat dramatic answer, "Why should they fear me? am I not a bird myself, for my soul always flies to heaven as they fly through the sky." Columba had a celebrated successor called Caimin, who died in 653. Ussher, who calls him St. Caminus, tells us that part of his Psalter was extant in his own time, and that he had himself seen it "having a collation of the Hebrew text placed on the upper part of each page, and with brief scholia added on the exterior margin."[31]