In 1938 Chief Thundercloud played Tonto in the serial The Lone Ranger (1938). In 1939 he repeated the role in the serial The Lone Ranger Rides Again (1939) with Robert Livingston as The Lone Ranger.
Rodd Redwing, who plays Running Deer, was an expert with a bow and arrow and an actual fast draw who tutored many western stars. That's Redwing who gets gunned down by Matt Dillon during the intro to "Gunsmoke".