"Full of them!"
"Br-r-r!" shivered the fat boy.
"A wonderful place for scientific research," mused the Professor.
"Why don't you stay in Bright Angel for a while and study ghosts?" suggested Stacy.
"I decline to be drawn into so trivial a discussion," answered Professor
Zepplin severely.
"You wouldn't think it was trivial were you to see one of those things."
"Perhaps the Professor, too, has overloaded his stomach some time before going to bed," spoke up Tad Butler.
"You are mistaken, young man. I never make a glutton of myself," was the grim retort.
"Now will you be good, Tad Butler?" chuckled Walter Perkins.
"Yes, I have nothing more to say," answered Tad, with a hearty laugh.