The boy's back was toward him, but the man observed the newcomer and gave a nod.

Then he dropped his eyes again to the table.
Kenneth was frowning sullenly.
"You're bound to lose the pawn, whichever way you play," said the little man quietly.
The boy gave an angry cry, and thrust the table from him, sending the chess-men clattering into a corner.

Instantly the little man leaned over and grasped the boy by the collar, and with a sudden jerk landed him across his own fat knees.

Then, while the prisoner screamed and struggled, the man brought his hand down with a slap that echoed throughout the room, and continued the operation until Master Kenneth had received a sound spanking.
Then he let the boy slip to the floor, from whence he arose slowly and backed toward the door, scowling and muttering angrily.
"You broke the bargain, and I kept my word," said Uncle John, calmly taking his pipe from his pocket and filling it.

"The compact was that if you raised a rough-house, like you did yesterday, and got unruly, that I'd give you a good thrashing.