"The twelfth fight was at Fetlafjord,
Where Olaf's honour-seeking sword
Gave the wild wolf's devouring teeth
A feast of warriors doomed to death."
From thence King Olaf sailed southwards to Seljupollar, where he had a
battle. He took there a castle called Gunvaldsborg, which was very large
and old. He also made prisoner the earl who ruled over the castle and
who was called Geirfin. After a conference with the men of the castle,
he laid a scat upon the town and earl, as ransom, of twelve thousand
gold shillings: which was also paid by those on whom it was imposed. So
says Sigvat:--
"The thirteenth battle now I tell,
Where it was fought, and what befell.
In Seljupol was fought the fray,
And many did not survive the day.
The king went early to the shore,
To Gunvaldsborg's old castle-tower;
And a rich earl was taken there,
Whose name was Geridin, I am sure."