Warner, Gertrude Chandler,  1890- <br/><br/>
Tree house mystery. 
Illus.: David Cunningham. 
 - Chicago,  A. Whitman  [1969] 
 - 127 p.  illus.  22 cm. 
 - Pilot books .
<br/><br/> Six children help solve the mystery of a missing spyglass that has kept two brothers feuding for years. 
<br/><br/><label>ISBN: </label>0807580864 :  $10.95 
<br/><br/><label>LCCN: </label>77091744 /AC 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mystery and detective stories.
<br/><br/><label>LC Class. No.: </label>PZ7.W244  / Tr 
<br/><br/><label>Dewey Class. No.: </label>[Fic]