King Olaf summoned to him all the lendermen, and had a great many people about him this summer (A.D. 1025), for a report was abroad that King Canute would come from England. People had heard from merchant vessels that Canute was assembling a great army in England. When summer was advanced, some affirmed and others denied that the army would come. King Olaf was all summer in Viken, and had spies out to learn if Canute was come to Denmark. In autumn (A.D. 1025) he sent messengers eastward to Svithjod to his brother-in-law King Onund, and let him know King Canute's demand upon Norway; adding, that, in his opinion, if Canute subdued Norway, King Onund would not long enjoy the Swedish dominions in peace. He thought it advisable, therefore, that they should unite for their defence. "And then," said he, "we will have strength enough to hold out against Canute." King Onund received King Olaf's message favourably, and replied to it, that he for his part would make common cause with King Olaf, so that each of them should stand by the one who first required help with all the strength of his kingdom. In these messages between them it was also determined that they should have a meeting, and consult with each other. The following winter (A.D. 1026) King Onund intended to travel across West Gautland, and King Olaf made preparations for taking his winter abode at Sarpsborg.
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