advisers over the Norwegian nobles, and when King Magnus I of Norway, the son of the former King of Norway, Olaf, invaded in 1035, they were forced to flee to Harthacnut's court. Harthacnut was a close ally of Svein, but he did not feel his resources were great enough to launch an invasion of Norway, and the half-brothers looked for help from their father, but instead they received news of his death in November 1035. Reign Harold and Denmark In 1035, Harthacnut succeeded his father on the throne of Denmark as Cnut III. He was unable to come to England in view of the situation in Denmark, and it was agreed that Svein's full brother, Harold Harefoot, should act as regent, with Emma holding Wessex on Harthacnut's behalf. In 1037, Harold was generally accepted as king, Harthacnut being, in the words of the Anglo-Saxon Chronicle, "forsaken because he was too long in Denmark", while Emma fled to Bruges, in Flanders. In 1039, Harthacnut sailed with ten ships to meet his mother in Bruges but delayed an invasion as it was clear Harold was sick and would soon die, which he did in March 1040. Envoys soon crossed the channel to offer Harthacnut the throne. While the general outline of events following Cnut's death are clear, the details are obscure, and historians give differing interpretations. states that it is unclear whether Harthacnut was to have England as well as Denmark, but it was probably a reflection of a formal arrangement that mints south of the Thames produced silver pennies in his name, while those to the north were almost all Harold's. There might have been a division of the kingdom if Harthacnut had appeared straight away. He probably stayed in Denmark because of the threat from Magnus of Norway, but they eventually made a treaty by which if either died without an heir, his kingdom would go to the other, and this may have freed Harthacnut to pursue his claim to England. According to Ian Howard, Harthacnut agreed to help Svein recover Norway and planned an invasion in 1036. Svein died shortly before it was to set out, but Harthacnut proceeded anyway. War was avoided by the treaty between Harthacnut and Magnus, which Harthacnut agreed to because he had no plausible candidate to rule Norway after Svein's death, and he was in any case temperamentally inclined to avoid campaigns and wars.