Every one would say that a compact of this kind could not work well. A gentle, kindly, generous-hearted man like King Magnus was ill matched with a haughty, wealth-loving, tyrannical man like Harold. No doubt many bitter words passed between them, and the peasants were so incensed by Harold's oppression and extortion of money from them that they would have broken into open rebellion only for the love they bore King Magnus. The latter was often so incensed that he was tempted to put an end to the double kingship even if he had to remove his troublesome partner by violence.
But this was not to be. One day, while out riding, his horse took fright and threw him, his head striking a stump. He was at first stunned, but seemed to recover. Soon afterwards he was taken sick with a violent fever and gradually sank, so that it became apparent that he would die. On his death-bed he decided that Sweyn, who had fought so hard to win from him the crown of Denmark, had a better right to that kingdom than Harold, and men were sent to inform him of his succession to the Danish throne. But he had barely closed his eyes in death when Harold sent other men to intercept these messengers. He proposed to keep Denmark for himself.
The death of King Magnus without an heir left Harold the undisputed successor to the throne, as the only living descendant in the male line of Harold the Fair-Haired. Yet the people were far from pleased, for he had already shown a disposition to treat them harshly and they feared that a tyrant had succeeded to the throne. By his stern rule he gained several uncomplimentary titles, the English calling him Harold the Haughty, the Germans Harold the Inflexible, and the Northmen Harold the Hardruler. Yet he was able to hold his own over his people, for he was strong and daring, skilled in the art of war, and a man of unusual intellect. He was also a poet and won fame by his verses. He would sit up half the night with the blind scald Stuf Katson, to hear him recite his stirring songs.
But if absolute ruler over Norway, Harold found Denmark slipping away from him. Sweyn had in him the blood of the race of Canute, and was no weakling to be swept aside at a king's will. Magnus had left him the kingdom and he was bent on having it, if his good sword could win and hold it. In this he was supported by the Danes, and Harold found that the most he could do was to make descents on the Danish coast and plunder and murder the innocent people.
After this idle kind of warfare had gone on for a number of years and Harold found that all he had gained by it was the hatred of the Danes, he made an agreement with Sweyn to fight it out between them. They were to meet at the mouth of the Götha Elv and whoever won in the battle was to be the king of Denmark. It was a kind of duel for a crown.
But Sweyn tried to gain his end by stratagem. When Harold appeared with his fleet at the appointed place Sweyn and his ships were not to be seen. Harold waited a while, fuming and fretting, and then sailed south to Jutland, where he ravaged the coast, took and burned the city of Heidaby, carried away a number of women of high rank, and filled his ships with plunder. Then he turned homeward, with so little fear of the Danes that he let his ships widely scatter.
The winds were adverse, the weather was foggy, and one morning while they lay at anchor by an island shore, the lookout saw a bright flash through the fog. The king was hastily called, and on seeing it cried:
"What you see is the flash of the morning sun on the golden dragon-heads of warships. The Danish fleet is upon us!"
The peril was imminent. It was hopeless to fight with the few ships at command. Only flight remained and that was almost as hopeless. The oars were got out in haste, but the ships, soaked and heavy from their long cruise, were hard to move, and as the fog lifted under the sun rays, the Danish fleet, several hundred strong, bore down swiftly upon them. The emergency was one that needed all the wit and skill of the king to meet.
To distract the enemy Harold bade his men nail bright garments and other showy spoil to logs and cast them overboard. As these floated through the Danish ships many of them stopped to pick up the alluring prizes. He also was obliged to throw overboard casks of beer and pork to lighten his ships and these also were picked up. Yet in spite of all he could do the Danes gained on him, and his own ship, which brought up the rear, was in danger of capture.