Franklin W. Dixon

The Hidden Harbor Mystery is Volume 14 in the original The Hardy Boys Mystery Stories published by Grosset & Dunlap. This book was written for the Stratemeyer Syndicate in 1935, purportedly by Leslie McFarlane; however, the writing style is noticeably different from other books in the series known to have been …

The Haunted Fort is Volume 44 in the original The Hardy Boys Mystery Stories published by Grosset & Dunlap. This book was written for the Stratemeyer Syndicate by David Grambs in 1965.