The movie Jeremiah Johnson introduced millions to the legendary mountain man, John Johnson. The real Johnson was a far cry from the Redford version. Standing 6'2" in his stocking feet and weighing nearly 250 pounds, he was a mountain man among mountain men, one of the toughest customers on the western frontier. As the story goes, one morning in 1847 Johnson returned to his Rocky Mountain trapper's cabin to find the remains of his murdered...