The Chronicle of The Kings of Norway
Part 169 - King Olaf's Course From Svithjod
When King Olaf began his journey, he came first into Smaland, and then into West Gautland. He marched quietly and peaceably, and the country people gave him all assistance on his journey. Thus he proceeded until he came into Viken, and north through Viken to Sarpsborg, where he remained, and ordered a winter abode to be prepared (A.D. 1028).
Then he gave most of the chiefs leave to return home, but kept the lendermen by him whom he thought the most serviceable. There were with him also all the sons of Arne Arnmodson, and they stood in great favour with the king. Geller Thorkelson, who the summer before had come from Iceland, also came there to the king, as before related.