The Clue of the Black Keys

The Clue of the Black Keys
Author: Carolyn Keene
Language English
Pages: 174
ISBN10: 0448095289
Genre: Mystery
Series Nancy Drew
Goodreads Rating: 3.87
ISBN13: 9780448095288
Published: 1968 by Grosset & Dunlap

During an archaeological expedition in Mexico, two professors, the senior Dr. Joshua Pitt and young Terry Scott find a clue to buried treasure. The clue was a cipher carved on a stone tablet. Before the older professor had time to translate it, he and the tablet disappeared! Terry tells Nancy of his suspicions of a Mexican couple, posing as scientists, who vanished the same night as Dr. Pitt. Nancy follows a tangled trail of clues that lead to Florida and Mexico and a secret of antiquity that can only be unlocked by three black keys.

This book is the revised text.

The plot of the original story (©1951) is similar with minor revisions.