Buck Jones #7 (1952)

Buck Jones investigates a mysterious letter addressed to a prisoner at Calabaga Prison that actually leads to a scheme by a group of bald knobbers—cattlemen who plan to terrorize sheepherders into selling their land. Jones uncovers the plot and works to stop their illegal activities by gathering evidence of their conspiracy. He ultimately aids in exposing the bald knobbers' criminal enterprise, with assistance from Trig Nelson at the Bar-M Ranch.