Totally different era, and bowhunting was in it's infancy. This was a time when it was questionable as to the efficiency of a bow.
Some of his kills may have been questionable, but the man was an absolutely amazing shot. Likely at least some of the shots were set up so they could be "caught" on film. Ever see the size of movie cameras back then?
Ben Pearson is probably my favorite. An amazing shot, a real inventor/innovator, but never seemed to promote himself but rather the sport.
Bill Negley was another.