An inventory of the supplies showed that everything was accounted for. This, Stacy declared, was because he had frightened the three-legged rat away from camp. He said he had a worse fright in store for it if it showed itself around that outfit again. Chops looked very solemn at this. The fright the guide had had served to chasten and subdue him. This was not lost on the Pony Rider Boys, nor was the significance of it, either.

"Nine o'clock. Time to move," announced the Professor finally, closing his watch with a snap. "We will start now. Are you ready, boys?"

"All ready," answered the lads in chorus.

"All ready to start—something!" added Chunky.

"No, we will not start anything, my boy," rebuked the Professor.

"Stacy is quite given to slang of late," laughed Tad.

"I have observed as much," answered the Professor dryly. "I trust you will cut out slang, young man." The Professor eyed the fat boy sternly.

"I trust you will, too, Professor," retorted Stacy.

"I—I use slang?" demanded the Professor indignantly.

"Yes. You said I must 'cut out' slang. If that isn't slang, my dictionary is ahead of the times," returned Stacy triumphantly.