Allen Mawer,
1911 Encyclopædia Britannica
(1911)
“ DANELAGH, the name given to those districts in the north and north-east of England which were settled by Danes and other Scandinavian invaders during the period of the Viking invasions. The real settlement of England by Danes began in the year 866 with the appearance of a large army in East Anglia, which turned north in the following year. The Danes captured York and overthrew the Northumbrian kingdom, setting up a puppet king of their own. ”
