Olaf the Glorious A Story of the Viking Age by Leighton, Robert, -1934

War horns were sounded, arrows of challenge were fired over the opposing fleets, the berserks on either side clashed their arms and bit the rims of their shields, working themselves into a wild war fury. Then the fleets closed in upon each other amid a storm of arrows, and the grim battle began.

The ships of the vikings were higher in the hull than those of the Norwegians, and this gave them an advantage, for, when the grapplings were thrown out and the ships were lashed together, the Jomsburgers could fire their arrows and spears down upon the heads of their foes. The onset and attack were faultlessly made, and for a long while it seemed uncertain which side was getting the better hand. But at length Earl Hakon, who was supporting his son Sweyn against Sigvaldi, saw that his northern wing was being forced backward, and he hastened to its aid. Nevertheless, Bui the Thick still pressed the Norwegians back with heavy blows and a ceaseless rain of arrows and spears, and it seemed that at this point the vikings were quickly gaining the victory. On the southern wing, however, the fight was more equal, and Earl Erik thought that he would go to his brother's help. He went thither, accordingly, but could do no more than set the wing in line again. Hakon then returned to fight against Sigvaldi.

Now, by this short absence, Earl Erik had weakened the southern wing, and, when he came back to defend his ships, he found that Vagn Akison and Olaf Triggvison had broken through the line and made great havoc. Erik was a brave warrior, however, and he did not hesitate to make a bold attack upon the ships of these two champions. He encountered them with four of his best longships against their two. The battle at this point now grew furious, and the carnage on both sides was tremendous. Vagn and Olaf, followed by their berserks, jumped on board Erik's ship, and each went along either side of her, clearing his way, so that all fell back before the mighty blows. Erik saw that these two warriors were so fierce and mad that he would not long be able to withstand them, and that Earl Hakon's help must be got as quickly as possible. Yet he goaded his men on, and they made a brave resistance. Olaf was often attacked by three or four berserks at once, but he guarded every blow, and received but little hurt. He fought whiles with his sword and whiles with his battleaxe, and at times even with both weapons, one in either hand, dealing many hard and heavy blows, and slaying many a man. And ever when the decks were cleared there came on board other hosts of men from the neighbouring ships. Olaf wanted to come to a hand to hand combat with Earl Erik, but Erik always avoided him.