King Olaf was taken sick and died before he reached manhood, and it seems to have been only in name that he had any share in the government. The relation between Eystein and Sigurd was not always the most cordial, and Sigurd was usually to blame for it. The winter of 1112-13 King Eystein spent most of the time at Sarpsborg. There lived at that time at Mikle-Dal in Aamord a rich and influential man called Olaf of Dal. He spent a good part of the winter at Sarpsborg with his daughter Borghild, a very handsome and accomplished girl. Borghild and King Eystein often met, and the king found great pleasure in conversing with her. The people began to talk about this friendship, and King Sigurd, who was then at Konghelle, also heard of the girl that his brother had taken a liking to. When Borghild heard it whispered that people talked ill of her intimacy with King Eystein, she took it much to heart. When Eystein had gone north she went to Sarpsborg, and, after suitable fasts, carried red-hot irons to prove her innocence, endured the test, and thus cleared herself from all offence. Sigurd then rode over to her home, where he remained all night, made Borghild his concubine and took her away with him. They had a son, who was called Magnus, and was immediately sent to Halogaland to be fostered by Vidkun Jonson of Biarkey. The relation between the brothers remained strained as long as they both were kings, but it never came to a breach of peace. Occasionally they even peacefully met as each other's guests. On one of these occasions, when the two kings were feasting together at one of Eystein's estates, they had what was called a "man-measuring," or comparison of merits. The saga says that in the evening, when the people began to drink, the ale was not good, so that the guests were very quiet and still. Then said King Eystein: "Why are the people so silent? It is more proper in parties that people are merry, so let us find some jest over our ale that will amuse us; for surely, brother Sigurd, all will like to see us happy." Sigurd replied, rather bluntly: "Do you talk as much as you please, but give me leave to be silent." Eystein said: "It is a common custom over the ale-table for one person to compare himself with another, and now let us do so." Sigurd did not answer. "I see," said Eystein, "that I will have to begin this amusement, and I will take thee, brother, to compare myself with; we are both kings, have equal property, and there is no difference in our birth." Sigurd then said: "Dost thou remember that I could always throw thee when we wrestled, although thou art a year older?" Eystein: "But I remember also that I was better at the games which require limberness." Sigurd: "But how was it when we were swimming? I could duck thee whenever I wanted to." Eystein: "But I could swim as far as thou, and could dive as well; and I could run on ice-legs[10] so well that nobody could beat me, while thou couldst no more do it than a cow."