The secret of the old mill /
The Hardy boys determined to learn the secret to the old mill employ a clever ruse to gain entrance only to find themselves trapped in a subterranean passageway
| Main Author: | |
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| Format: | Book |
| Language: | English |
| Published: |
New York :
Grosset & Dunlap,
1962
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| Series: | Dixon, Franklin W Hardy boys mystery stories ;
3. |
| Subjects: |