Nu sculon herian heofon-rices Weard Metodes meahta ond his mod-geþanc weorc Wuldor-Fæder swa he wundra gehwæs ece Dryhten or astealde He ærest scop ielda bearnum heofon to hrofe halig Scieppend Þa middan-geard mann-cynnes Weard ece Dryhten æfter teode firum foldan Frea ælmihtig

...he wæs on Norðhymbron heardes cynnes...

There is a particular tendency in medieval European history (and probably other pre-modern histories as well) to try and pin down the ethnic statistics of a given area in a given time.* How much of Anglo-Saxon England was populated by 'genuine' Anglo-Saxons? Were there Celtic holdovers? What is a Celt, anyway, and how widely spread across Eurasia were they? Let us track their movements. I don't ...