00906cam a2200241 4500 9775173 TxAuBib 20050405120000.0 ||||||s1968||||||||||||||||||||||||und|u 9780448089294 0448089297 TxAuBib Dixon, Franklin W. The secret of the lost tunnel. New York : Grosset & Dunlap, 1968. 174 p : ill ; 19 cm. Hardy boys mystery stories ; 29 The Hardy boys travel to the Deep South to vindicate a long-dead Confederate general, disgraced during the Civil War because he was accused of stealing hidden gold belonging to a bank. 4.0 Follett Library Resources. 5-8. Mystery and detective stories. Hardy boys mystery stories ; 29.