triumphant aeroplane swoop, that Peggy, to her secret amusement could
trace the astonished look on the faces of the employees and the chagrined
expression that darkened Mortlake's countenance.

"I guess I've given them something to think over," she said
mischievously, flinging back a brilliant smile at the dazed young officer.

"Now," she exclaimed the next moment, "for a distance flight. I'm anxious
to put the _Golden Butterfly_ through all her paces. Oh, by the way, the
balancer. I haven't shown you how that works yet."

If Peggy's bright eyes had not been veiled by goggles, the officer might
have seen a mischievous gleam flash into them, like a wind ripple over the
placid surface of a blue lake.

Suddenly the aeroplane slanted to one side, as if it must turn over. Peggy
had banked it on a sharp aerial curve. The young officer, in spite of
himself, in defiance of his training, gave a gasp.

"I say----"

But the words had hardly left his lips before the aeroplane was back on a
level keel once more. At the same time a rasping, sliding sound was
heard.

"Like to see how that was done?" asked Peggy, with a bewitching smile.

"Yes. By Jove, I thought we were over for an instant. But how----"

"That we shall be glad to show you when the United States government has