The boys paused to admire Fenn's "pets" as well as to take a more careful view of the reptiles they had "borrowed" from the school. Then Bart and his two chums put back into the bags the snakes, lizards, turtles, toads and alligators belonging to the professor, and hurried back with them to the school. They were lucky in escaping observation by the janitor, and soon the science-cabinet cages held their former tenants.