"Sis, do you mean you are going to try it?"

"Of course. We must."

"Then go in and win," cried the boy; "you can follow the tracks by the lights and once you overtake the train the rest will be easy."

The amazed doctor fairly dropped his case of instruments at this whirlwind dialogue.

"But—what—why—bless my soul," he gasped, but only the first part of his remarks was heard by Peggy. Followed by Wandering William she dashed from the room and into the street. In front of the hotel Cash was having a hard time keeping souvenir hunters from the aeroplane. But a pair of blue revolvers, like miniature Gatling guns, acted as powerful dissuaders of curiosity.

CHAPTER XXV

A RACE THROUGH THE NIGHT

"All right. Stand clear, please!"

The aeroplane had been tuned up, and now, panting like an impatient horse, it was ready to be off on its dash for Monument Rocks. But the crowd stupidly clustered about it like bees round a rose bush. The delay was maddening, but Peggy dared not start for fear of injuring someone.

"Won't you please stand aside?" she begged for the twentieth time, but the crowd just as obstinately lingered.