"Why, that's Bobby Coon's house!" cried Peter, and then he saw the joke and began to grin too.

In a few minutes they heard Drummer's long roll. Then again and again. The third time it broke off right in the middle, and right away a terrible fuss started down at the big chestnut-tree. They could hear Drummer's voice, and it sounded very angry.

"Ah reckon Brer Coon was waked up and lost his temper," chuckled Unc' Billy. "It's a bad habit to lose one's temper. Yes, Sah, it cert'nly is a bad habit. Ah reckons Ah better be turning in fo' another nap, Brer Rabbit." With that Unc' Billy disappeared, still chuckling.

Hardly was he out of sight when Peter saw Drummer heading that way, and Drummer looked very much put out about something. He just nodded to Peter and flew straight to Unc' Billy's tree. Then he began to drum. How he did drum! His red-capped head flew back and forth as Peter never had seen it fly before. Rat-a-tat-tat-tat-tat! Rat-a-tat-tat-tat! Rat-a-tat-tat-tat-tat! Drummer hardly paused for breath. There was too much noise for Peter, and he kicked up his heels and started for the Smiling Pool, and all the way there he laughed.

"I hope Unc' Billy is enjoying a good nap," he chuckled. "Drummer certainly has turned the joke back on Unc' Billy this time, and I guess it serves him right."

He was still laughing when he reached the Smiling Pool. Grandfather Frog watched him until he began to smile too. You know laughter is catching. "Ha, ha, ha! Ho, ho, ho!" laughed Peter and held his sides.

"What is the joke?" demanded Grandfather Frog in his deepest voice.

When Peter could get his breath, he told Grandfather Frog all about the joke on Unc' Billy Possum. "Listen!" said Peter at the end of the story. They both listened. Rat-a-tat-tat-tat-tat! The long roll of Drummer the Woodpecker could be heard clear down to the Smiling Pool, and Peter and Grandfather Frog knew by the sound that it still came from Unc' Billy's house.

"Chug-a-rum! That reminds me," said Grandfather Frog. "Did you ever hear how Drummer came by his red cap?"

"No," replied Peter. "How did he?" There was great eagerness in Peter's voice.