Andy.

"I don't know. They are a scared lot, that's sure! Perhaps they saw a
sea serpent alongside! It couldn't be that a jaguar has boarded us. No,
look at old Quito, how he lifts his head and takes a terrified look!
Why, he seems to be observing something up above in the heavens as sure
as you live!"

As Frank shot out these words he, too, bent his head back to scan the
brazen sky above. A cry broke from his lips.

"Why, what under the sun does it mean?" exclaimed Andy, who had also
turned his eyes heavenward to discover a strange thing speeding over the
tops of the trees, one, two thousand feet high, and at the same time
there came to his ears a familiar throbbing that could have but one
meaning.

"An aeroplane!" he burst forth in thrilling tones; "and the sillies down
there think it's just a frightfully big bird about to carry them
off. Hey, Frank, perhaps the government has got one of the new
contraptions after all!"

"Go slow," said Frank. "Suppose you look a bit closer, my boy. Isn't
there something familiar about that same craft up yonder?"

"It's--it's a biplane, Frank!" gurgled Andy.

"Yes, and one you've set eyes on before, too, old fellow. It belongs
to--"

"Puss Carberry!" burst from Andy's quivering lips, as he continued to
stare, as if almost unable to believe his own eyes.

CHAPTER XIII.

THE "DEVIL-BIRD."

"Yes, Puss Carberry and his crony, Sandy Hollingshead!" declared Frank,
positively.

"But, it seems impossible! All these hundreds and hundreds of miles away
from old Bloomsbury and Puss Carberry floating over us! Sure I must be
dreaming, Frank!" stammered the other, still gaping up at the rapidly
passing aircraft.

"No, you're just as wideawake as ever you were in all your sweet life,"
said Frank. "Take a better look, Andy; don't you see now that it's the
same biplane we raced with the day Sandy dropped that bag of sand,
hoping to break our winning streak in the dash for Old Thunder Top?"

"Anyhow it's a ringer for it, I give you my word!" muttered the stunned
boy.

Frank, with an exclamation of impatience, sprang forward and snatched
something up that had just caught his attention. This proved to be the
fine field glasses that had been brought along on the adventure.

These he clapped to his eye, and as they were already fitted and adapted
to his sight, he lost not a second in covering the passing aeroplane.

"Look for yourself, my boy!" he cried, handing the binocula