Kalends of January
. AD 822.
Diarmait son of Donnchad, abbot of Ros Ech, died.
Dub dá Crích son of Mael Tuile, abbot of Cell Achaid, fell asleep.
Sechnasach of Loch Cendin, bishop and anchorite, rested.
Conaing son of Congal, king of Tethba, dies.
Patrick's law was imposed on Mumu by Feidlimid son of Crimthann, and by Artri son of Conchobor i.e. bishop of Ard Macha.
Rónán, abbot of Cluain Moccu Nóis, resigned his office as superior.
Murchad son of Mael Dúin was deposed by Niall son of Aed and the Cenél Eógain.
Heathens invaded Bennchor the great.
Galinne of the Britons with all its dwelling-places and oratory was burned by Feidlimid.
Fire from heaven struck the abbot's mansion in Ard Macha and burned it.