"Well, it looked to me like a rat," answered the fat boy solemnly.

"You will all have the nightmare tonight if you don't choose a more cheerful topic for discussion just before turning in," warned Professor Zepplin.

"Yes, change the subject," urged Rector. "I don't want to dream of four-legged rats and blind mice, and besides, Chops is on the verge of nervous prostration."

Chunky got up and stretched himself. He strolled over to where Billy stood leaning against a rock.

"The rat had your face," he whispered sharply in the ear of the guide.

Chops uttered a blood-curdling yell and with a leap cleared the campfire and started racing for the tall timber.

"There He Goes!"

"There he goes," wailed Ned.

"After him!" shouted Tad.