As soon as Erling heard that a Danish force had come to Viken, he ordered a levy through all the land, both of men and ships, so that there was a great assemblage of men in arms; and with this force he proceeded eastward along the coast.
But when he came to Lidandisnes, he heard that the Danish army had returned south to Denmark, after plundering all around them in Viken. Then Erling gave all the people of the levy permission to return home; but he himself and some lendermen, with many vessels, sailed to Jutland after the Danes. When they came to a place called Dyrsa, the Danes who had returned from the expedition lay there with many ships.
Erling gave them battle, and there was a fight, in which the Danes soon fled with the loss of many people; and Erling and his men plundered the ships and the town, and made a great booty, with which they returned to Norway. Thereafter, for a time, there was hostility between Norway and Denmark.