On the second floor of Blackmoon Castle, in Margaret's room.
"Where should I start? Before I went to the royal city, Master Antonio brought me to the City of Steel and the Floating City of Stanley. Many things happened in those two cities. In the City of Steel, I created a tower that leads to the sky. Its name is—"
"The Tower of Babel."
Margaret was holding a quill and writing on a piece of brown paper. Watson sat on the sofa and crossed his hands as he explained to Margaret. Unfortunately, he was interrupted by Margaret before he could finish his words.
"I know about the Tower of Babel that you built in the City of Steel. After all, many Blackmoon Knights have gone there to serve as gatekeepers. After returning, their strength has increased a lot. I heard that you even have a mighty black dragon there! I have recorded those in Watson, the Hero's Biography, in the tenth volume, Climbing the Tower."