 In 837 a fleet of sixty longships sailed up the River Liffey and raided "churches, forts and dwellings", including presumably those at Dublin.Later in the same year, a certain Saxolb (Söxulfr), "chief of the foreigners", was killed in Brega by the Uí Colgain, a branch of the Cíanachta Breg.The "Chronicon Scotorum" and the "Annals of Clonmacnoise" ascribe "the first taking and possession of the Danes in Dublin" to this year.