The Story of Norway by Hjalmar Hjorth Boysen

King Knut could not, with his extensive possessions, devote much time to the government of Norway. He therefore had his son Sweyn proclaimed King of Norway in his stead. Sweyn's mother, who accompanied him to his new kingdom, was Aelgifa, the daughter of an ealdorman in Northampton. The Norsemen, however, called her Alfifa, and her son Sweyn Alfifasson. This was, accordingly, what the chiefs had gained by their rebellion -- to be openly governed by the mistress of a foreign king and a boy who was and could be nothing but a tool in her hands. It was a humiliation which they could ill brook. If Alfifa had had the faintest comprehension of the people whom she undertook to govern, she might possibly for a time have maintained her son upon the throne; but when she proceeded to remodel the Norse legislation in the feudal spirit, she struck a blow at the very men who were the main-stay of her power.

What the chiefs had desired was local independence -- the right to manage their own affairs with as little interference as possible. They had hoped to obtain this liberty under a king who was too far away to trouble them. But now came Sweyn, and with him a number of Danes who became very important personages, and induced the king to modify the Norse laws so as to bring them more nearly into conformity with the laws of Denmark. It was then enacted that no one should have the right to leave the country without the king's permission, and that confiscation of property should be the punishment for transgression. Man-slaying was likewise to be punished by confiscation.