Kalends of January, twenty-ninth of the moon
. AD 940 alias 941.
Severe frost so that the ice on lakes and streams was passable.
Birth of Brian son of Cennéitig.
An expedition i.e. the expedition in the frost(?) was made by Muirchertach, and he plundered Mide and Ú Fhailgi, and went into Osraige, obtaining their submission. He ravaged the Déisi, and brought Cellachán, king of Caisel, in submission to Donnchad.
Mael Ruanaid son of Flann, i.e. heir designate of Ailech, was killed by the Cenél Conaill.
Eochu son of Scannal, superior of Imlech Ibuir, dies.
Aenacán, priest of Dún Lethglaise, dies.