The Annals of Ulster () are annals of medieval Ireland. The entries span the years from 431 AD to 1540 AD. The entries up to 1489 AD were compiled in the late 15th century by the scribe Ruaidhrí Ó Luinín, under his patron Cathal Óg Mac Maghnusa, on the island of Senadh-Mic-Maghnusa, also known as Senad or Ballymacmanus Island (now known as Belle Isle, where Belle Isle Castle is located), near Lisbellaw, on Lough Erne in the kingdom of Fir Manach (Fermanagh). Later entries (up to AD 1540) were added by others. Entries up to the mid-6th century are retrospective, drawing on earlier annalistic and historical texts, while later entries were contemporary, based on recollection and oral history. T. M. Charles-Edwards has claimed that the main source for its records of the first millennium A.D. is a now lost Armagh continuation of the Chronicle of Ireland. The Annals used the Irish language, with some entries in Latin. Because their sources were copied verbatim, the Annals 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 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. There are two main modern English translations of the annals – Mac Airt and Mac Niocaill (1983) and MacCarthy (1893). Content Kings Several kings are mentioned throughout the Annals of Ulster. The Annals tend to follow the lives of the kings, including important battles, raids, and their ultimate death. Between the years of 847 and 879, three different kings are highlighted. For example: Máel Sechnaill mac Máele Ruanaid, the king of the southern Ui Neill clan from 846 to 862: 839.6 – First mentioned in the Annals of Ulster having killed Crunnmael son of Fiannamail. 841.2 – Kills Diarmait 843.1 – Mael Sechnaill's father, Mael Ruanaid, dies 845.7 – Kills his brother Flann 845.8 – Takes Tuirgéis prisoner 846.7 – Suffers heavy losses at hands of Tigernach 847.2 – Begins his reign. 847.3 – Destroys the Island of Loch Muinremor 848.4 – defeats Vikings at Forach 849.12 – conducts siege in Crupat 850.3 – Cinaed, king of Cianacht, with