Jones reads the letter and the puzzle and says that Oxley was referring to Cuzco, Peru. Jones and Williams fly down there, where Jones learns that Oxley was put in a jail a couple of months ago. In the prison, Oxley scratched out some drawings. Jones and Williams head to a grave site where they believe Francisco de Orellana lies buried; legend tells that he found the crystal skull but was never found. They find the skull and come up only to find Mac and some Soviets pointing weapons at them.