While Ben Gates is presenting new information about John Wilkes Booth and the 18 pages missing from Booth s diary, a man by the name of Mitch Wilkinson stands up and presents a missing page of John Wilkes Booth s diary. Thomas Gates, Ben s great-grandfather, is mentioned on the page. It shows that Ben s great-grandfather was a co-conspirator in Abraham Lincoln s murder. When doing more research, the conspiracy takes Ben, Abigail Chase, and Riley Poole to Buckingham Palace (which they break into). They discover a plank that has early Native American writing on it. The plank has only one symbol that Patrick Gates can identify. The symbol is Cibola (see-bowl-uh) meaning the City of Gold. In order to define the rest the have to go to Ben s mother, Patrick s divorced wife. After 32 years it brings back old arguments. After that the other clue is in the President s...