After Tom Canty and The Prince of Whales exchanged stories, they decided to exchange there clothing. They looked identical.
So you are the son of John Canty.
Yes, I am the son of John Canty, Sir.
Logically John Canty didn't believe the Prince of Whales, on the other hand everyone at the palace was asking Tom if he was alright. Everyone was treating him kindly and with respect. Something that Tom never lived before. Later that day a person announced the death of the King.
What? Who are you? Are you Tom's father?
What?? Yes I am YOUR Father Tom!
Where were you?!! Why weren't you working, Damn kid!