I think his name was there on a sort of to do list. And, it was there because he could decipher the code. I think he did decipher the code to where the gold was, realized what he had and that is why he burned the page or pages with the code and the deciphered part of it.
At least that is how I remembered it. I could be wrong.
Oh, and yes there is a sequel in the works and I think it does relate to page 47.