TY  - GEN
AU  - Dixon,Franklin W.
TI  - The secret panel
SN  - 0448089254
U1  - D621s 
PY  - 1946///
CY  - New York
PB  - Grosset & Dunlap Publishers
KW  - MYSTERY AND DETECTIVE STORIES-FICTION
N1  - 3-6; Follett Library Resources; AR; 5.2; 5
N2  - Frank and Joe Hardy help a stranger who has had an accident with his car.  The man introduces himself as John Mead, owner of a nearby estate.  After he continues on his way, Frank finds an odd-looking house key which belongs to Mead.  But when the Hardys try to return it, they learn that John Mead died five years ago!  They are even more amazed when they find that the intricately carved doors in the dead man's deserted mansion have no visible knobs or keylocks.
ER  -