Dr. Sinskey hears of Langdon’s apparent destination of Geneva and worries that Zobrist’s target is the WHO itself, but she also realizes Geneva is geographically unsuitable as ground zero for a plague.

She recalls her first meeting with Langdon at Hanscom Air Force Base in Massachusetts the day before. At the time, she introduced her knowledge of all the clues Langdon has encountered up to the Palazzo Vecchio, and he had quickly deciphered them. He then demanded to accompany her to Florence in person.

On the train to Venice, Langdon attempts to glean more information from the past few days out of Dr. Ferris, but he and Sienna both concur that dislodging too many forgotten memories at once could incapacitate him, and they need his Dante knowledge. Langdon puts his mind to work deciphering the riddle poem.

On the Mendacium, Knowlton is unexpectedly visited in his cubicle by the provost, who demands to see Zobrist’s tape.

Langdon, Sienna, and Dr. Ferris walk through as much of the riddle poem as they can, including that “mouseion” is likely an archaic translation of “museum,” but they are unable to solve the entire riddle. The trio decides to visit St. Mark’s Basilica in Venice, as its prominence makes it appear most likely to offer real answers.