s just as daring as ever! That is his one weakness, I'm
afraid!" he remarked, as they saw the other make a sudden swoop that
must have been particularly trying in the planes of his machine.

"I bet you he's going to break his neck some day," grumbled Andy, who
could not bring himself to feel just the same way toward Percy as his
cousin did; according to the way boys look at these things, Andy was
the more "human" of the two; having faults that were lacking in Frank.

"That's certain a better biplane than the one they had last year,"
Larry remarked, after he had been thrilled with the daring exhibition
Percy was putting up in his exultation at being once more afloat in the
air, after a long absence.

"A great deal better," Frank admitted. "I knew what the faults were
with that old plane, and so far I fail to discover the same failings
with this one. If Percy would only use a little more sense, and not be
so willing to take unnecessary risks, he could have a grand time this
summer."

"Gee! look at him going it now, would you?" gasped Elephant. "He must
have a bully good motor aboard to eat up space like that. Talk to me
about your mile a minute, he's beating that all hollow!"

"No doubt of it," laughed Frank; "for everything happens to be
favorable just now;" but Andy frowned and remarked:

"Oh! I just guess that ain't anything so remarkable. Percy hasn't got
the push on our biplane. I'd take my affidavy that we went faster than
that at one time when Frank let her out. You wait and see; some fine
day we'll show you a sight that'll make your eyes stick out."

Andy was not a boaster as a rule; but whenever Percy Carberry started
to show what a mighty conqueror of the air he had become, something
seemed to rise up within the second Bird boy that made him give vent to
such expressions.

"He knows we're watching him, that's why he does it!" said wise
Elephant.

"Sure," Larry admitted; "but that don't take away anything from his
circus stunts, does it? Now he's going to swing around and circle your
field, Frank. Wish he'd take a notion to drop down here, and let's
look his new article over."

Andy laughed scornfully.

"I see him doing that same, Larry, when water runs up hill!" he
observed sarcastically. "Did you ever know Percy to be open and frank?
Ain't he always hiding what he knows, and trying to spring surprises on
people? You don't catch him letting Frank look over his biplane, not
if he knows