Markus of Skog, and King Sigurd, his foster-son, rode down to Viken towards spring, and there got a ship; but when Erling heard it he went eastwards against them, and they met at Konungahella. Markus fled with his followers to the island Hising; and there the country people of Hising came down in swarms, and placed themselves in Markus's and Sigurd's array. Erling and his men rowed to the shore; but Markus's men shot at them.
Then Erling said to his people,
"Let us take their ships, but not go up to fight with a land force. The Hisingers are a bad set to quarrel with, — hard, and without understanding. They will keep this troop but a little while among them, for Hising is but a small spot."
This was done: they took the ships, and brought them over to Konungahella. Markus and his men went up to the forest district, from which they intended to make assaults, and they had spies out on both sides. Erling had many men-at-arms with him, whom he brought from other districts, and they made attacks on each other in turn.