Frank and Joe Hardy, brothers who are high school students, use their investigation skills to solve the mystery of the treasure stolen from the eccentric Applegate family. After finally finding out who did it, the dying criminal confesses that the loot had been hidden "in the old tower." The tower is searched in vain, but it remained for the Hardy boys to make an astonishing discovery that cleared up the mystery.
This resource is supported by the Institute of Museum and Library Services under the provisions of the Library Services and Technology Act as administered by State Library of Iowa.