CONTENTS
Van Powell
I
“Suspicious Sandy”
5
II
Ghosts, Gum—and Gems
13
III
The Sky Patrol Organizes
21
IV
Mystery Over the Ocean
30
V
Mystery in the Fog
42
VI
The End of the Chase
50
VII
The Swamp Gives Up a Clue
54
VIII
Sandy Meets a “Suspect”
64
IX
Jeff Encounters a “Jinx”
73
X
Larry’s Capture
82
XI
“Pop! Goes Our Mystery!”
95
XII
The Hoodooed Airplane
103
XIII
The “Hoodoo” Strikes
112
XIV
Dick Handles a Control Job
121
XV
A Trap is Baited
131
XVI
The “Bait” Vanishes
139
XVII
A Fight for a Fortune
146
XVIII
Outwitted!
155
XIX
A Baffling Discovery
160
XX
Sandy Turns Over a New Leaf
168
XXI
The Sky Patrol Gives Up
176
XXII
The “Ground Crew” Takes Hold
182
XXIII
Larry “Solos”
190
XXIV
A Puzzling Development
196
XXV
High Wings!
204
XXVI
The Race
212
XXVII
Sandy’s Discovery
220
XXVIII
Night in the Hangar
228
XXIX
Sandy’s Trail
239
XXX
Dick Encounters the “Ghost”
245
XXXI
A Triumph for the Enemy
250
XXXII
A Double Pursuit
255
XXXIII
A Battle Above the Clouds
263
XXXIV
The Emeralds Are Found
270
THE HAUNTED HANGAR
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