But penda refused them, swearing to destroy Oswy and all his race.
penda's allies were Christian, and he showed no antipathy to the new faith.
He had married his son and his daughter to children of penda; and he gave him another of his sons as a hostage.
Three years afterwards king penda died, and the Mercians were baptized.
When Oswy found that all entreaties were in vain, he mustered his forces together, which were far inferior to penda's in number.
penda and Cadwalla "fared thence, and undid all Northumbria."
Other Celtic missionaries penetrated further south, even into the heathen realm of penda and his tributary princes.
And still the christian Britains were lesse mercifull than penda his heathenish souldiers.
Nennius says penda slew Oswald at the "battle of Cocboy," and that "he gained the victory by diabolical agency."
Alfred, the son of Oswy, in return married the daughter of penda, whose name was Cyneburga.