Chapter
I—THE BOY FLIERS
II—ON GUARD
III—NOT CAUGHT NAPPING
IV—THE STARTLING NEWS
V—THE EXCITEMENT GROWS
VI—FIGURING IT ALL OUT
VII—THE AIR SCOUTS
VIII—JUST BELOW THE CLOUDS
IX—THE PILOT OF THE MERMAID
X—HEARD OVER THE WIRE
XI—COMPARING NOTES
XII—AT THE HOSKINS FARM
XIII—THE BUTTERFLY COLLECTOR
XIV—A CLUE
XV—WHEN CASPER CAME BACK
XVI—THROWING OFF THE MASK
XVII—SALLIE RIDES BAREBACK
XVIII—AN AEROPLANE CHASE
XIX—DROPPING A "BOMB!"
XX—OVER LAND AND SEA
XXI—OVER THE BOUNDARY LINE
XXII—THE HYDROPLANE RESCUE
XXIII—BROUGHT TO BOOK—CONCLUSION
THE BOY FLIERS
"It was my mistake, Frank!"
"How do you make that out, Andy?"
"Simply because I was using the little patent Bird monkey-wrench last inour shop, and should have put it back in the toolbox belonging to theaeroplane. The fact that it isn't here shows that I mislaid it. Give mea bad mark, Frank."
"Well, I must say it's a queer stunt for you to forget anything, AndyBird. But with dark coming along, and home some miles away, it's plainthat we'll have to let the mending of that wing go till morning."
"But do you think, Frank, it's just safe to leave our pet hydroplaneover night in this field on the Quackenboss farm?"
"Why not, Andy? Sky as clear as a bell; little or no wind promised; andthen we can hire the farm hand, Felix Boggs, to keep an eye on it. Looksas easy as falling off a log."
"And all because I didn't put that little wrench where it belonged!Kick me, won't you, please, cousin; I deserve it."
"Well, I guess not. Didn't I make just as bad a break last week? I guessnow, no boy's perfect. And I don't mind the walk home a bit. Fact is, itought to do us both good, because we don't stretch our legs enough, asit is."
"You're the boss chum, Frank!"
"Then you're another. See what you get for calling me names. But whenyou've fastened down that plane so it can't get into trouble, if thewind should rise in the night, perhaps we'd better be hunting up th