The Message in the Hollow Oak by Carolyn Keene.  Grosset & Dunlap: New York (1935).   Hardcover in blue cloth pictorial boards with orange silhouette and orange lettering, in dust jacket, 218 pages plus ads.  

Number 12 in the Nancy Drew Mystery Stories series.  Illustrated with glossy black & white frontispiece, plus three other glossy illustrations within the text, pictorial endpapers with white background and orange silhouettes of Nancy & her three friends. 

Thirteen titles listed on front flap of jacket &  on copyright page. Lists 6 Dana Girls on rear flap & 9 Judy Boltons on rear panel.  Top edge stained red.  

Nancy is embroiled in a mystery concerning a train wreck, a ghost, and a secret message! 

Very good condition.  Dust jacket has light edge-wear and corner nicks.  Book is a nice clean copy, previous owner's name and date.

Winning bidder pays S&H.