CTATLC Clues

In Charlie Thorne and the Lost City, Charlie receives clues regarding where to find Charles Darwin's "lost treasure".

Clues

 * 1) Firstly, Esmeralda Castello finds a clue via a tortoise shell on a recently deceased tortoise that was almost 200 years of age. The original clue reads "The Greatest Treasure in Human History." "If in death, Eros, and evil shall rest and minds quit obeying".
 * 2) The clue brings her to Charlie who later brings Charlie to the Devil's Stone which then has the following numbers inscribed on it 21343131345244231533713534422451150, 511434421423432133413112134428415331130 ,453344243144231552114415404443023123 ,54341231343414, 442315332124331444231344421515, 124524314431242515.
 * 3) Using a box cipher, which Charlie Thorne, Dante Garcia and Milana Moon all immediately recognized as the appropriate way to crack it, they discovered  it read "Follow the Napo River, east from Coca for ten days until the water turns to blood then find the tree built like King's College Chapel".