davinci code, part 4

Im coming close to finishing this book and im flabbergasted. They’ve cracked the idea of what the cryptex holds, but have no clue what the password could be. Sophie and Robert have now come to one of Robert’s oldest friends who happen to be a priory fen. He discusses with Robert what the password could be but they have no real idea except that they must go back into the city of Paris and investigate the church where sir Isaac newton was buried. They are planning out their attack to accomplish this task when one of the butlers enters the room and tell the group that the police are at the gate and aware the fugitives were there. They sneak out the back door just in time to escape the police but now the heat is on, and they have nothing to help them figure out this huge mystery except a single lead…