The Chronicle of The Kings of Norway
Part 33 - Death Of Guthorm And Halfdan The White
While King Harald's son Guthorm had the defence of Viken, he sailed outside of the islands on the coast, and came in by one of the mouths of the tributaries of the Gaut river. When he lay there Solve Klofe came upon him, and immediately gave him battle, and Guthorm fell. Halfdan the White and Halfdan the Black went out on an expedition, and plundered in the East sea, and had a battle in Eistland, where Halfdan the White fell.