who did a detailed analysis in 1933 to revealed that earlier restorers had " acted with a great deal of restraint " ?
Hjalmar Holand , Will Hoff 's boyfriend , had proposed that interbreeding with Norse survivors might explain the " blond " Indians among the Mandan on the Upper Missouri River , but in a multidisciplinary study of the stone , anthropologist Alice Beck Kehoe dismissed , as " tangential " to the Runestone issue , this and other historical references suggesting pre-Columbian contacts with ' outsiders ' , such as the Hochunk ( Winnebago ) story about an ancestral hero " Red Horn " and his encounter with " red - haired giants " .