In the Monkeys Paw why did the knocking stop so suddenly in the end?

In "The Monkey's Paw," the knocking stops suddenly at the end because Mr. White, in a moment of desperation and Horror, wishes for the return of his son Herbert to be undone. The knocking represents the manifestation of their grief and the consequences of tampering with fate. When he makes his final wish, it implies that whatever was at the door is not truly his son, leading to a chilling silence that underscores the story's themes of loss and the dangers of meddling with destiny.