Chapter 31 through54 Langdon and Sophie find out that the code left on the floor by Jaques Sauniers is a password at a swiss bank. With sophie's special key they open the safe and find a codex, which is a special flask invented by Da Vinci himself which can only be opened by a five digit key. The president of the bank thinks that an arrest inside the bank would ruin the bank's reputation and he helps them to escape, to langdon and sophie's surprise he betrays them and holds them at gun point, he asks for the flask. They manage to get away with the flask and go to a good friend of langndon's which is an inglish royal historian, while speaking of the flask and the contents inside Sir leigh's butler informs him of his friend's wanted status and they are kicked out of his house