THE SECRET OF THE CAVES—When the boys reached the caves they came unexpectedly upon a queer old hermit.
THE MYSTERY OF CABIN ISLAND—A story of queer adventures on a rockbound island.
THE GREAT AIRPORT MYSTERY—The Hardy Boys solve the mystery of the disappearance of some valuable mail.
WHAT HAPPENED AT MIDNIGHT—The boys follow a trail that ends in a strange and exciting situation.
WHILE THE CLOCK TICKED—The Hardy Boys aid in vindicating a man who has been wrongly accused of a crime.
FOOTPRINTS UNDER THE WINDOW—The Smuggling of Chinese into this country is the basis of this story in which the boys find thrills and excitement aplenty.
GROSSET & DUNLAP, Publishers, NEW YORK
TED SCOTT FLYING STORIES