Kalends of January
. AD 789.
Death of Nóe, abbot of Cenn Garad.
Cormac, son of Fergal; Dúngal son of Lóegaire, abbot of Dún Lethglaise; Mael Combair, abbot of Glenn dá Locha; Mael Tuili son of Aengus; Siadal, abbot of Duiblinn; Cinaed son of Anmchad, king of Uí Liatháin; Tomaltach son of Innrechtach, king of Dál nAraidiall died.
The battle of Áth Rois won by the Uí Ailella over the Luigni, in which Dub da Tuath son of Ailill or of Flaithgusa, chief of the Three Septs, fell.
The burning of Echdruim Mac nAeda.
The taking on tour of the relics of Caemgein and of Mo-Chua moccu Lugedon.
A great slaughter of the Ulaid by the Dál nAraidi.
The battle of Conall and Custantín is entered here in other books.