The Burgess Animal Book For Children in "The Squirrels Of The Trees"

"Just the same, you are a Squirrel," retorted Ryder. "The Woodchucks belong to the Squirrel family. Old Mother Nature says so, and if she says so, it is so. You'd better join our school, Johnny Chuck, and learn a little about your own relatives."

Johnny Chuck blinked his eyes and for a minute or two couldn't find a word to say. He knew that if Ryder were telling the truth as to what Old Mother Nature had said, it must be true that he was member of the Squirrel family.