going higher? I believe I'd like to go up a bit."

"I knew it!" cried Tom. "Up we go!" And he pulled the wind-bending plane
lever toward him. Upward shot the craft, as if alive.

"Oh!" gasped Mary.

"Sit still! It's all right!" commanded Tom.

"It's glorious; glorious!" she cried. I'm not a bit afraid now!"

"I knew you wouldn't be," declared the young inventor, who had
calculated on the fascination which the motion through the air,
untrammeled and free, always produces. "Shall we go higher?"

"Yes!" cried Miss Nestor, and she gazed fearlessly down at the earth,
which was falling away from beneath their feet. She was in the grip of
the air, and it was a new and wonderful sensation.

Tom went up to a considerable distance, for, once a person loses his
first fright, one hundred feet or one thousand feet elevation makes
little difference to him. It was this way with Miss Nestor.

Now, indeed, could Tom demonstrate to her some of the fine points of
navigation in the upper currents, and though he did no risky "stunts,"
he showed the girl what it means to do an ascending spiral, how to cut
corners, how to twist around in the figure eight, and do other things.
Tom did not try for the great speed of which he knew his craft was
capable, for he knew there was some risk with Miss Nestor aboard. But he
did nearly everything else, and when he sent the Humming-Bird down he