Dangerous deeds

Lawrence went through the secret manoeuvers but there was no response and he found his anxiety growing.
AVIATOR SERIES VOLUME 3
DANGEROUS DEEDS
THE FLIGHT IN THE DIRIGIBLE
CAPTAIN FRANK COBB
THE SAALFIELD PUBLISHING COMPANY
CHICAGO AKRON, OHIO NEW YORK
Copyright, MCMXXVII, by
THE SAALFIELD PUBLISHING COMPANY
AVIATOR SERIES
1 BATTLING THE CLOUDS,
Or, For a Comrade’s Honor