midnight
They were dead tired , but happy , and after a sousing wash-up they got into their pajamas and , throwing their blankets on the floor of the little office , were soon fast asleep . In spite of his fatigue Ned did not sleep soundly . It had been threatening a thunder storm all evening and the increasing oppressiveness of the air made the young , aeronaut wakeful . The long whistle and jarring stop of the midnight local train finally fully aroused him . In the west the thunder was rumbling and great sheets of heat lightning promised a storm in a short time . After slipping out into the corral and seeing that the waterproof silk sides of the car were securely buttoned around the engine Ned returned and again tried to go to sleep . But his restlessness continued .