 H. H. Lamb has on the other hand proposed that the land he reached may have been either Spitsbergen or Novaya Zemlya.Accepting he could not conquer Denmark, Harald switched attention to England; his claim was based on a 1038 agreement between Magnus and its previous ruler, Harthacnut, who died childless in 1042.This stated if either died, the other would inherit their lands; however, it was unlikely Magnus assumed he would gain the English throne without fighting.