Perhaps the same thing that Mark and his older friend Gaynor have searched for for ten years. "Something hidden. Go and find it. Go and look behind the Ranges -- Something lost behind the Ranges. Lost and waiting for you. Go " Will Mark find lost treasure, or sudden death?

Jackson Gregory was a California schoolteacher before turning to writing. He first appeared in Adventure in 1915, and became a regular in Western Story. He did mysteries, fantasy, and south sea adventure, but wrote mainly westerns, producing several per year till his death in 1943. As his dustjacket copy put it: "Mr. Gregory has won a place as one of the most entertaining and successful American storytellers. The backgrounds of his tales are authentic for he 'lives his stories' by locating in the place where the plot is laid and becoming for the time a native son."