Grandfather Frog in "Billy Mink Finds Little Joe Otter"

Suddenly a new thought popped into his head. "Billy Mink saw him, and that is why he is so anxious to find Little Joe Otter. He is planning to play some trick on Grandfather Frog as sure as pollywogs have tails!" exclaimed Jerry. Then his eyes began to twinkle as he added: "I think I'll have some fun myself."
Without another word Jerry slipped down into the water and swam over to the big green lily-pad of Grandfather Frog. Then he hit the water a smart blow with his tail.