Bissextile. Kl. The burning of the house of Dubchrón Ua Longacháin, in which seventy fell; and the banishment of [Norse] officials from Mumu; and the three ordinances, viz., the banishment of the [Norse] officials, the banishment of the foreigners from Luimnech, and the burning of the fortress, were enacted by the counsel of the nobles of Mumu, namely, Mathgamain and Faelán and the son of Bran, and others.
Repose of Tuathal, abbot of Cluain Moccu Nóis.
Death of Aed son of Loingsech, king of Ulaid, by the grandson of Matudán.
Death of Murchad son of Finn, king of Laigin.
Death of Gébennach son of Diarmait, king of Ciarraige Luachra.
Kl. of January, the fourth feria [Wednesday], twenty-third of the moon, second concurrent.
Repose of Cinaed of In Durthach, anchorite of Ireland, in Cluain Ferta Brénainn.
Dub dá Leithe, coarb of Patrick, came to Mumu and made his visitation; and he and the coarb of Ailbe quarrelled regarding the levy, and Mathgamain, king of Mumu, made peace between them, and they agreed upon the perpetual right of [the coarb of] Patrick.
Death of Conchobar son of Tadc son of Cathal, king of Connachta; and Connachta was then harried by Murchad Glún re Lár, and Cathal, son of Tadc, was killed immediately after taking the kingship.
Kl. The fifth feria [Thursday], fourth of the moon.
The son of Aralt made a circuit of Ireland with a great company, and plundered Inis Cathaig, and brought Ímar from it into captivity.
Death of Murchad Glún re Lár.
Repose of Scandlán Ua hEirc, learned bishop and abbot of Inis Cathaig.
The son of Bran took the hostages of Mumu from Luimnech southwards, and marched against Mathgamain.
Death of Donnchadh Finn, son of Mael Sechnaill.
Kl. Death of Cormac, son of Faelán, by the army of Mathgamain.
Ímar escaped over sea, and Inis Ubdan was captured again.
Bissextile. Kl. The slaying of Mael Sechnaill son of Flannabra, king of Gabair, by foreigners.
Death of Donnchadh son of Cellach, king of Osraige.
The capture of Mathgamain son of Cennétig, king of Caisel. He was treacherously seized by Donnuban and handed over to the son of Bran in violation of the guarantee and despite the interdiction of the elders of Mumu, and he as put to death by Bran's son.
Kl. The second feria [Monday], seventh of the moon, seventh concurrent.
Ímar, king of the foreigners, and his two sons, were killed on Inis Cathaig by Brian, son of Cennétig.
A raid by Brian, son of Cennétig, on Uí Fhidgeinte, and he made a slaughter of foreigners therein.
Muirchertach son of Domnall, royal heir of Ireland, and the son of Domnall son of Congal, another royal heir, were both killed by the foreigners of Áth Cliath, [A.D.] 978.
Kl. The third feria [Tuesday], eighteenth of the moon, [first] concurrent.
The battle of Belach Lechta, in which Mael Muad son of Bran, king of Caisel, and many others fell. Brian, son of Cennétig, was victor.
Corcach was plundered, and Fínnechta the bishop, died.
Kl. The fourth feria [Wednesday], twenty-ninth of the moon.
Bissextile. Kl. The fifth feria [Thursday], tenth of the moon.
Death of Donnubán, king of Ress.
Death of Domnall Ua Néill, king of Temuir.
A great battle between Mael Sechnaill and the son of Amlaíb, and a slaughter of foreigners including Ragnall, son of Ímar, at Temuir, a measuring rod being required everywhere.
Repose of Faelán son of Caellaide, abbot of Imlech Ibuir.
Death of Comaltán Ua Cleirig.
Kl. The seventh [feria], twenty-first of the moon.
Repose of Anmchad, bishop of Laigin.
Repose of Eógan, abbot of Cluain Ferta Brénainn.
Repose of Mugrón, coarb of Colum Cille.