Kalends of January
[...]
. AD 836.
The bishop and anchorite Flaithroa, abbot of Mainister Buiti, and Martain, bishop of Cluain Chaín, rested.
Mael Dúin son of Sechnasach, king of Fir Chúl, Tuathal son of Fiangalach, king of Cenél Ardgail, Riacán son of Fínnechta, one of two kings of the Laigin, died.
A naval force of the Norsemen sixty ships strong was on the Bóinn, and another one of sixty ships on the river Life. Those two forces plundered the plain of Life and the plain of Brega, including churches, forts and dwellings. The men of Brega routed the foreigners at Deoninne in Mugdorna of Brega, and six score of the Norsemen fell.
The heathens won a battle at Inber na mBárc against the Uí Néill from the Sinann to the sea, in which an uncounted number were slaughtered, though the principal kings escaped.
Inis Celtra was plundered by the heathens.
The churches of all Loch Éirne, including Cluain Eóis and Daiminis, were destroyed by the heathens.
Cenél Cairpri Cruim was plundered by Feidlimid.
Cathal son of Muirgius inflicted a rout on the Munstermen.
Saxolb, chief of the foreigners, was killed by the Cianacht.