Inge was now sole king, but it was only a short time that he was in undisputed possession of the country. The adherents of the late kings, Eystein and Sigurd, chose the latter's son as their chief and gave him the title of king. He was then ten years old. He was afterward given the surname Herdebred, _i.e._, the broad-shouldered. Haakon and his adherents were outlawed by King Inge, who took possession of all their estates, after they had sought refuge in Sweden. Gregorius Dagson was then in Konungahella, where the danger was greatest, and had with him a strong and fine body of men, with which he defended the country. He defeated Haakon's force in a decisive battle at Konungahella (1159). Later Haakon, who had strengthened his forces with a number of robbers and adventurers, harried the frontier districts in Viken. One day he came to the estate of Haldor Brynjolfson, a brother-in-law of Gregorius Dagson, set fire to the house and burned it. Haldor came out, but was instantly cut down together with his house-men; in all about twenty men were killed. Haldor's wife, Sigrid, Gregorius Dagson's sister, escaped to the forest in her night-dress; but the five year old Aamunde Gyrdson, a nephew of Gregorius, was carried away by Haakon's men. When Gregorius Dagson heard of this he took it much to heart, and set out to avenge the outrage. On January 7, 1161, Gregorius caught sight of Haakon's force. There was a river, called Befia, between them, and in trying to cross it on the unsafe ice Gregorius fell through, and, while struggling to get ashore, was killed by an arrow shot by one of Haakon's men. When King Inge, who was then in Oslo, heard of Gregorius Dagson's death, he cried like a child, and, after having recovered himself, swore to attack Haakon, and either avenge his friend's death or die in the attempt. On the 3d of February, 1161, King Inge's spies brought him word that Haakon was coming toward the town (Oslo). The king ordered his men called together, and when they were drawn up in line they numbered nearly 4,800. When the night was well advanced, the spies came and informed the king that Haakon and his army were coming over the ice, which lay all the way from the town to the Hoved Isle. King Inge then led his army out on the ice, and drew it up in order of battle. The king and his brother Orm took their places under the banner in the centre. On the right wing, toward the nunnery, was Gudrod, the exiled king of the South Hebrides, and Jon Sveinson, a grandson of Bergthor Buk. On the left wing, toward Thrælaberg, stood the chiefs Simon Skalp and Gudbrand Skafhoggson, who was married to King Eystein Magnusson's daughter Maria. When Haakon and his army came near to King Inge's array, both sides raised a war shout. But then it appeared that there were traitors in Inge's army. Gudrod and Jon gave the enemy a signal, and when Haakon's men in consequence turned that way, Gudrod immediately fled with 1,800 men; and Jon, and a great body of men with