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.