"I'm not a Rodent; I'm a Porcupine," grunted Prickly Porky indignantly.

"You're a Rodent just the same. You've got big gnawing teeth, and any one with that kind of teeth is a Rodent," retorted Peter. Then at a sudden thought a funny look passed over his face. "Why, that means that you and I are related in a way," he added.

"Don't believe it," grunted Prickly Porky, still shuffling along. "Don't believe it. Don't want to be related to anybody as heedless as you. What is this school, anyway? Don't want to go to school. Know all I want to know. Know how to get all I want to eat and how to make everybody get out of my way and leave me alone, and that's enough to know." He rattled the thousand little spears hidden in his coat, and Peter shivered at the sound. It was a most unpleasant sound.

"Well, some folks do like to be stupid," snapped Peter and hurried on, lipperty-lipperty-lip, while Prickly Porky slowly shuffled and rattled along behind.

All the others were there when Peter arrived. Prickly Porky wasn't even in sight. Old Mother Nature wasted no time. She has too much to do ever to waste time. She called the school to order at once.