The Chronicle of The Kings of Norway
Part 184 - Of King Olaf In His Proceedings
King Olaf sailed with his ships out to Tunsberg, as soon as he heard that King Canute had turned back, and was gone south to Denmark. He then made himself ready with the men who liked to follow him, and had then thirteen ships.
Afterwards he sailed out along Viken; but got little money, and few men, as those only followed him who dwelt in islands, or on outlying points of land. The king landed in such places, but got only the money and men that fell in his way; and he soon perceived that the country had abandoned him. He proceeded on according to the winds. This was in the beginning of winter (A.D. 1029).
The wind turned very late in the season in their favour, so that they lay long in the Seley islands, where they heard the news from the North, through merchants, who told the king that Erling Skjalgson had collected a great force in Jadar, and that his ship lay fully rigged outside of the land, together with many other vessels belonging to the bondes; namely, skiffs, fisher-yachts, and great row-boats.
Then the king sailed with his fleet from the East, and lay a while in Egersund. Both parties heard of each other now, and Erling assembled all the men he could.