Kalends of January
. AD 854.
Cathan, abbess of Cell Dara, dies.
There was snow to the height of men's belts on the ninth of the Kalends of May 23 April.
Aed son of Niall made a foray against the Ulaid, and he left behind dead Coinnecán son of Colmán and Flaithbertach son of Niall, and a large number besides.
Fínnechta i.e. son of Mael Brigte, was treacherously killed.
Ruidgus son of Maicnia, abbot of Mainister Buiti, was drowned.
Ailill, abbot of Achad Bó, Robartach, abbot of Inis Cáin Dega and a scribe, and Muiredach, king of Ard Cianachta, die.