"I’m not. Mainly because you aren’t. If you were so sure about DIII, why didn’t you publish? Then someone who did have access to the Vatican Archives could have come in here and checked out Diagramma a long time ago."

"I didn’t want to publish," Langdon said. "I had worked hard to find the information and—" He stopped himself, embarrassed.

"You wanted the glory."

Langdon felt himself flush. "In a manner of speaking. It’s just that—"

"Don’t look so embarrassed. You’re talking to a scientist. Publish or perish. At CERN we call it ‘Substantiate or suffocate.’ "

"It wasn’t only wanting to be the first. I was also concerned that if the wrong people found out about the information in Diagramma, it might disappear."

"The wrong people being the Vatican?"

"Not that they are wrong, per se, but the church has always downplayed the Illuminati threat. In the early 1900s the Vatican went so far as to say the Illuminati were a figment of overactive imaginations. The clergy felt, and perhaps rightly so, that the last thing Christians needed to know was that there was a very powerful anti-Christian movement infiltrating their banks, politics, and universities." Present tense, Robert, he reminded himself. There is a powerful anti-Christian force infiltrating their banks, politics, and universities.

"So you think the Vatican would have buried any evidence corroborating the Illuminati threat?"

"Quite possibly. Any threat, real or imagined, weakens faith in the church’s power."

"One more question." Vittoria stopped short and looked at him like he was an alien. "Are you serious?"

Langdon stopped. "What do you mean?"

"I mean is this really your plan to save the day?"

Langdon wasn’t sure whether he saw amused pity or sheer terror in her eyes. "You mean finding Diagramma?"

"No, I mean finding Diagramma, locating a four-hundred-year-old segno, deciphering some mathematical code, and following an ancient trail of art that only the most brilliant scientists in history have ever been able to follow… all in the next four hours."

Langdon shrugged. "I’m open to other suggestions."

50

Robert Langdon stood outside Archive Vault 9 and read the labels on the stacks.

Brahe… Clavius… Copernicus… Kepler… Newton…

As he read the names again, he felt a sudden uneasiness. Here are the scientists… but where is Galileo?

He turned to Vittoria, who was checking the contents of a nearby vault. "I found the right theme, but Galileo’s missing."

"No he isn’t," she said, frowning as she motioned to the next vault. "He’s over here. But I hope you brought your reading glasses, because this entire vault is his."

Langdon ran over. Vittoria was right. Every indictor tab in Vault 10 carried the same keyword.

Il Proceso Galileano

Langdon let out a low whistle, now realizing why Galileo had his own vault. "The Galileo Affair," he marveled, peering through the glass at the dark outlines of the stacks. "The longest and most expensive legal proceeding in Vatican history. Fourteen years and six hundred million lire. It’s all here."

"Have a few legal documents."

"I guess lawyers haven’t evolved much over the centuries."

"Neither have sharks."

Langdon strode to a large yellow button on the side of the vault. He pressed it, and a bank of overhead lights hummed on inside. The lights were deep red, turning the cube into a glowing crimson cell… a maze of towering shelves.

"My God," Vittoria said, looking spooked. "Are we tanning or working?"

"Parchment and vellum fades, so vault lighting is always done with dark lights."

"You could go mad in here."

Or worse, Langdon thought, moving toward the vault’s sole entrance. "A quick word of warning. Oxygen is an oxidant, so hermetic vaults contain very little of it. It’s a partial vacuum inside. Your breathing will feel strained."

"Hey, if old cardinals can survive it."

True, Langdon thought. May we be as lucky.

The vault entrance was a single electronic revolving door. Langdon noted the common arrangement of four access buttons on the door’s inner shaft, one accessible from each compartment. When a button was pressed, the motorized door would kick into gear and make the conventional half rotation before grinding to a halt—a standard procedure to preserve the integrity of the inner atmosphere.

"After I’m in," Langdon said, "just press the button and follow me through. There’s only eight percent humidity inside, so be prepared to feel some dry mouth."