The secret of the caves

THE HARDY BOYS
By FRANKLIN W. DIXON
Author of The Hardy Boys: The Tower Treasure The Hardy Boys: The Secret of The Old Mill The Hardy Boys: The Shore Road Mystery
ILLUSTRATED BY Walter S. Rogers
NEW YORK GROSSET & DUNLAP PUBLISHERS
Made in the United States of America
MYSTERY STORIES FOR BOYS
By FRANKLIN W. DIXON
THE HARDY BOYS: THE TOWER TREASURE THE HARDY BOYS: THE HOUSE ON THE CLIFF THE HARDY BOYS: THE SECRET OF THE OLD MILL THE HARDY BOYS: THE MISSING CHUMS THE HARDY BOYS: HUNTING FOR HIDDEN GOLD THE HARDY BOYS: THE SHORE ROAD MYSTERY THE HARDY BOYS: THE SECRET OF THE CAVES
GROSSET & DUNLAP, PUBLISHERS, NEW YORK
Copyright, 1929, by GROSSET & DUNLAP, Inc.
The Hardy Boys: The Secret of the Caves