<P> Unable to return home, the trio go to Patrick's house . Patrick tries to convince Ben that the treasure is a myth, but Ben dismisses this . The trio then study the Declaration and discover an Ottendorf cipher written in invisible ink . With the help of lemon juice and some heat from the hair dryer, they find out that the hidden cypher refers to the Silence Dogood letters written by Benjamin Franklin . Patrick formerly owned them, but donated them to the Franklin Institute . Using a school boy to acquire the letters' key words, Ben, Riley, and Abigail discover a message pointing to the bell tower of Independence Hall, where the Liberty Bell once stood . Unfortunately, Ian and his men question the school boy and pursue the new lead . Following the point on the opposite wall of the bell house where the shadow casted at exactly 2: 22 pm on the same day, Ben finds a hidden cache containing a pair of glasses with multiple colored lenses invented by Benjamin Franklin, which, when used to read the back of the Declaration, reveals a clue pointing to the symbol of Trinity Church which is located on Wall Street and Broadway in New York City . </P> <P> The group is chased by Ian's associates . Ben is arrested by the FBI, while Abigail and Riley lose the Declaration to Ian . However, Abigail convinces Ian to help them rescue Ben in exchange for the next clue . Ian agrees, arranging a meeting at the USS Intrepid, where they help Ben evade the FBI . </P> <P> Ian returns the Declaration and asks for the next clue, but when Ben remains coy, Ian reveals he has kidnapped Patrick as a hostage . They go inside Trinity Church where they sit and study the back of the Declaration of Independence using the different lenses resulting in the discovery of an underground passage known as Parkington Lane but it appears to lead to a dead end lit by a lone lantern . Patrick claims it is referencing the Midnight Ride of Paul Revere, pointing Ian to the Old North Church in Boston . Ian leaves Gates trapped in the chamber to die, heading for Boston . Patrick reveals the clue was a fake, then enters the treasure room using the clues they gathered on their journey, but it seems looted . After a heart to heart between Ben and Patrick, they find a notch which the meerschaum pipe fits into, opening a large chamber containing the treasure, then escape through a back exit . Ben contacts Sadusky, who is actually a Freemason, surrendering the Declaration and the treasure's location in exchange for clemency . Ian is later arrested when Ben tips the FBI off . </P> <P> Later, we see that Ben and Abigail have started a relationship . Meanwhile, Riley is somewhat upset that Ben turned down the 10% finder's fee for the treasure but accepted a much smaller amount of only 1%, which still has netted them all significant wealth . At the end, Riley drives away in a Ferrari . </P>

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