The publishers report a sale of this series of books of over a million copies! This is truly amazing to me, and again, as in the past, I thank my many young friends for their cordial reception of what I have written for them. I trust the present story will interest them and prove of benefit.

Affectionately and sincerely yours,

Arthur M. Winfield.

THE ROVER BOYS IN THE AIR


CHAPTER I

THE BOYS AND THE BIPLANE

"Fo' de land sakes, Massa Dick, wot am dat contraption yo' boys dun put togedder back ob de bahn yesterday?"