 Magnus was persuaded and in 1098 he launched a major campaign, taking his 8-year-old son Sigurd with him.However, Magnus had designs that were not envisaged by Haakon.He took possession of the islands, deposing both Erlend and Paul who were sent away to Norway as prisoners, Magnus and Erling Erlendsson were taken by Magnus as hostages and Sigurd was installed as the nominal earl.