What was Mr. White’s third wish, and why does Jacobs leave it to the reader to figure it out?

White's third and last wish, but the reader can easily imagine what the old man wished for. He wished for the knocking to stop and for the knocker to go away forever.

Explanation:

jenkins wanted the narrator to write a ghost story for his magazine. he wanted the narrator to give the readers a story based on the supernatural. he wanted him to give the readers real 'horror' stories and not the type of live ghosts which he had presented in his earlier stories.

i dont know i didnt take the test