Chapter 30

As Silas seeks the keystone, Sophie scrabbles for the key. They're after the same thing, although Sophie probably doesn't wear a loin swaddle. But while Silas is motivated by obsessive faith, Sophie gets what she wants through a geeky obsession with anagrams. If only St Paul had transferred his zeal to the Times crossword.

Meanwhile, poor old Langdon's flat out with a grieving security guard just itching to put a hole in his back, until the pistol-packing custodian is presented with the curatorial equivalent of the Judgement of Solomon.

Bet the Prof wishes he'd stayed in the toilet.