Dixon, Franklin W.The Hardy Boys: THE SECRET OF SKULL MOUNTAIN. Dustjacket Only. Grosset & Dunlap [New York]. No date [Pre-1962]. 5th format with pictorial wrap-around front panel & a spine logo of the boys in suits & ties within a circle (2nd format). This dustjacket was used between 1948 & 1966. The condition of the jacket, as well as the contents of the inner flaps & back panel, are shown in the accompanying scan.