Annals of Ulster, folio 55r

The Annals of Ulster, TCD MS 1282 (formerly H.1.8) are annals of medieval Ireland. The entries span the years from A.D. 431 to A.D. 1540. The entries up to A.D. 1489 were compiled in the late 15th century by the scribe Ruaidhrí Ó Luinín, under his patron Cathal Óg Mac Maghnusa on the island of Belle Isle on Lough Erne in the kingdom of Fermanagh. Later entries (up to A.D. 1540) were added by others. The Annals are written in Irish, with some entries in Latin. Because the Annals copied its sources verbatim, they are useful not just for historians, but also for linguists studying the evolution of the Irish language. A century later, the Annals of Ulster became an important source for the authors of the Annals of the Four Masters. It also informs the Irish text Cogad Gáedel re Gallaib (The War of the Irish with the Foreigners). The Library of Trinity College Dublin possesses the original manuscript; the Bodleian Library in Oxford has a contemporary copy that fills some of the gaps in the original.
(see folio 104b). These Annals were compiled by Cathal Mac Manus who d. 1498, and continued to 1541 by Roderick Cassidy, Archdeacon of Clogher. The present day copy ends imperfect at the year 1504