Gunhild's sons levied a great army in Viken (A.D. 963), and sailed along the land northwards, collecting people and ships on the way out of every district. They then made known their intent, to proceed northwards with their army against Earl Hakon in Throndhjem. When Earl Hakon heard this news, he also collected men, and fitted out ships; and when he heard what an overwhelming force Gunhild's sons had with them, he steered south with his fleet to More, pillaging wherever he came, and killing many people. He then sent the whole of the bonde army back to Throndhjem; but he himself, with his men-at-arms, proceeded by both the districts of More and Raumsdal, and had his spies out to the south of Stad to spy the army of Gunhild's sons; and when he heard they were come into the Fjords, and were waiting for a fair wind to sail northwards round Stad, Earl Hakon set out to sea from the north side of Stad, so far that his sails could not be seen from the land, and then sailed eastward on a line with the coast, and came to Denmark, from whence he sailed into the Baltic, and pillaged there during the summer. Gunhild's sons conducted their army north to Throndhjem, and remained there the whole summer collecting the scat and duties. But when summer was advanced they left Sigurd Slefa and Gudron behind; and the other brothers returned eastward with the levied army they had taken up in summer. 13. OF EARL HAKON AND GUNHILD'S SONS. Earl Hakon, towards harvest (A.D. 963), sailed into the Bothnian Gulf to Helsingjaland, drew his ships up there on the beach, and took the land-ways through Helsingjaland and Jamtaland, and so eastwards round the dividing ridge (the Kjol, or keel of the country), and down into the Throndhjem district. Many people streamed towards him, and he fitted out ships. When the sons of Gunhild heard of this they got on board their ships, and sailed out of the Fjord; and Earl Hakon came to his seat at Hlader, and remained there all winter. The sons of Gunhild, on the other hand, occupied More; and they and the earl attacked each other in turns, killing each other's people. Earl Hakon kept his dominions of Throndhjem, and was there generally in the winter; but in summer he sometimes went to Helsingjaland, where he went on board of his ships and sailed with them down into the Baltic, and plundered there; and sometimes he remained in Throndhjem, and kept an army on foot, so that Gunhild's sons could get no hold northwards of Stad. 14. SIGURD SLEFA'S MURDER. One summer Harald Grayskin with his troops went north to Bjarmaland, where be forayed, and fought a great battle with the inhabitants on the banks of the Vina (Dwina). King Harald gained the victory, killed many people, plundered and wasted and burned far and wide in the land, and made enormous booty. Glum Geirason tells of it thus:--