BTW In episode 19 of the drama Deep Rooted Tree, King Sejeong discovers that the butcher (Karion) is really Jeong Gi Joon, the head of the rebel organisation Milbon. Chae Yoon and the other guards are sent to investigate, and they search the butcher’s rooms, opening drawers etc. And on the side of one of the drawers, we can see the number 14. (see picture) But during King Sejong’s reign, arabic numerals would not have been used! Interesting mistake.