Ben Bowie and His Mountain Men #11

Ben Bowie and his mountain men encounter a treacherous trapper named Stalking Fox who has kidnapped a young boy named Billy Star, hoping the Sioux tribe will adopt him. When two members of Ben's party—David Blake and Aaron Guest—go missing, Ben discovers they have been captured by the Sioux. Ben negotiates with the tribe, revealing that Guest is actually an amateur astronomer, and manages to secure the release of his men while the tribe adopts Billy Star into their camp.