Kalends of January
[...]
. AD 846.
Feidlimid son of Crimthann, king of Mumu, a scribe and anchorite, and the best of the Irish, rested.
(Mael Sechnaill son of Mael Ruanaid begins to reign.)
Mael Sechnaill destroyed the Island of Loch Muinremor, overcoming there a large band of wicked men of Luigni and Gailenga, who had been plundering the territories in the manner of the heathens.
Cerball son of Dúngal inflicted a great rout on Agnonn, in which twelve hundred fell.
Mael Goán son of Echaid, king of Cenél Bógaine, died.
Cellach son of Mael Pátraic, prior of Fir Rois to the south of the river, dies.
Connmach son of Cernach, one of two kings of the Ciarraige of Connacht, died.
Artur son of Muiredach, king of western Life, died.
Cathal son of Coscrach, king of Fotharta, was killed by the Uí Néill.