The Motor Boys Over the Rockies; Or, A Mystery of the Air

A Mystery of the Air
CLARENCE YOUNG
Author of “The Racer Boys Series” and “The Jack Ranger Series.”
ILLUSTRATED
NEW YORK CUPPLES & LEON COMPANY
BOOKS BY CLARENCE YOUNG
THE MOTOR BOYS SERIES 12mo. Illustrated.
THE MOTOR BOYS Or Chums Through Thick and Thin
THE MOTOR BOYS OVERLAND Or A Long Trip for Fun and Fortune
THE MOTOR BOYS IN MEXICO Or The Secret of the Buried City
THE MOTOR BOYS ACROSS THE PLAINS Or The Hermit of Lost Lake
THE MOTOR BOYS AFLOAT Or The Stirring Cruise of the Dartaway