Frank cast a glance back toward the big field where the shed stood in which the great little monoplane, in which they had won their victory during Old Home Week, was stored.

Then, as was only natural, the eyes of the bicycle boy turned once again with more or less affection toward the quarter where he could just dimly make out the long, squat shed out in the field, in which the precious monoplane was stored.

The mysterious monoplane.

"Didn't we conquer one battery of cliffs that were said to be insurmountable, when we sailed in our dandy little monoplane up to the crown of Old Thunder Top, and snatched that silver cup for a prize?

And there would needs be deft manipulation of the gallant little monoplane by its clever pilot, if two separate flights out of the enclosed valley were to be undertaken.

But it's hardly complete without the wrecked monoplane and the small person who came with it.