Langdon wasn’t sure how it was relevant. “In a taxi,” he said, sitting down at the table. “Someone was shooting at us.”

“Shooting at you, Professor. Let’s be clear on that.”

“Yes. Sorry.”

“And do you remember any gunshots while you were in the cab?”

Odd question. “Yes, two of them. One hit the side mirror, and the other broke the rear window.”

“Good, now close your eyes.”

Langdon realized she was testing his memory. He closed his eyes.

“What am I wearing?”

Langdon could see her perfectly. “Black flats, blue jeans, and a cream V-neck sweater. Your hair is blond, shoulder length, pulled back. Your eyes are brown.”

Langdon opened his eyes and studied her, pleased to see his eidetic memory was functioning normally.

“Good. Your visual cognitive imprinting is excellent, which confirms your amnesia is fully retrograde, and you have no permanent damage to the memory-making process. Have you recalled anything new from the last few days?”

“No, unfortunately. I did have another wave of visions while you were gone, though.”

Langdon told her about the recurrence of his hallucination of the veiled woman, the throngs of dead people, and the writhing, half-buried legs marked with the letter R. Then he told her about the strange, beaked mask hovering in the sky.

“ ‘I am death’?” Sienna asked, looking troubled.

“That’s what it said, yes.”

“Okay … I guess that beats ‘I am Vishnu, destroyer of worlds.’ ”

The young woman had just quoted Robert Oppenheimer at the moment he tested the first atomic bomb.

“And this beak-nosed … green-eyed mask?” Sienna said, looking puzzled. “Do you have any idea why your mind might have conjured that image?”

“No idea at all, but that style of mask was quite common in the Middle Ages.” Langdon paused. “It’s called a plague mask.”

Sienna looked strangely unnerved. “A plague mask?”

Langdon quickly explained that in his world of symbols, the unique shape of the long-beaked mask was nearly synonymous with the Black Death—the deadly plague that swept through Europe in the 1300s, killing off a third of the population in some regions. Most believed the “black” in Black Death was a reference to the darkening of the victims’ flesh through gangrene and subepidermal hemorrhages, but in fact the word black was a reference to the profound emotional dread that the pandemic spread through the population.

“That long-beaked mask,” Langdon said, “was worn by medieval plague doctors to keep the pestilence far from their nostrils while treating the infected. Nowadays, you only see them worn as costumes during Venice Carnevale—an eerie reminder of a grim period in Italy’s history.”

“And you’re certain you saw one of these masks in your visions?” Sienna asked, her voice now tremulous. “A mask of a medieval plague doctor?”

Langdon nodded. A beaked mask is hard to mistake.

Sienna was knitting her brow in a way that gave Langdon the sense she was trying to figure out how best to give him some bad news. “And the woman kept telling you to ‘seek and find’?”

“Yes. Just as before. But the problem is, I have no idea what I’m supposed to seek.”

Sienna let out a long slow breath, her expression grave. “I think I may know. And what’s more … I think you may have already found it.”

Langdon stared. “What are you talking about?!”

“Robert, last night when you arrived at the hospital, you were carrying something unusual in your jacket pocket. Do you recall what it was?”

Langdon shook his head.

“You were carrying an object … a rather startling object. I found it by chance when we were cleaning you up.” She motioned to Langdon’s bloody Harris Tweed, which was laid out flat on the table. “It’s still in the pocket, if you’d like to have a look.”

Uncertain, Langdon eyed his jacket. At least that explains why she went back for my jacket. He grabbed his bloodstained coat and searched all the pockets, one by one. Nothing. He did it again. Finally, he turned to her with a shrug. “There’s nothing here.”

“How about the secret pocket?”

“What? My jacket doesn’t have a secret pocket.”

“No?” She looked puzzled. “Then is this jacket … someone else’s?”

Langdon’s brain felt muddled again. “No, this is my jacket.”

“You’re certain?”

Damned certain, he thought. In fact, it used to be my favorite Camberley.

He folded back the lining and showed Sienna the label bearing his favorite symbol in the fashion world—Harris Tweed’s iconic orb adorned with thirteen buttonlike jewels and topped by a Maltese cross.

Leave it to the Scots to invoke the Christian warriors on a piece of twill.

“Look at this,” Langdon said, pointing out the hand-embroidered initials—R.L.—that had been added to the label. He always sprang for Harris Tweed’s hand-tailored models, and for that reason, he always paid extra to have them sew his initials into the label. On a college campus where hundreds of tweed jackets were constantly doffed and donned in dining halls and classrooms, Langdon had no intention of getting the short end of an inadvertent trade.

“I believe you,” she said, taking the jacket from him. “Now you look.”

Sienna opened the jacket farther to reveal the lining near the nape of the back. Here, discreetly hidden in the lining, was a large, neatly fashioned pocket.

What the hell?!

Langdon was certain he had never seen this before.

The pocket consisted of a hidden seam, perfectly tailored.

“That wasn’t there before!” Langdon insisted.

“Then I’m imagining you’ve never seen … this?” Sienna reached into the pocket and extracted a sleek metal object, which she set gently in Langdon’s hands.

Langdon stared down at the object in utter bewilderment.

“Do you know what this is?” Sienna asked.

“No …” he stammered. “I’ve never seen anything like it.”

“Well, unfortunately, I do know what this is. And I’m fairly certain it’s the reason someone is trying to kill you.”

Now pacing his private cubicle aboard The Mendacium, facilitator Knowlton felt an increasing disquiet as he considered the video he was supposed to share with the world tomorrow morning.

I am the Shade?

Rumors had circulated that this particular client had suffered a psychotic break over the last few months, but this video seemed to confirm those rumors beyond any doubt.

Knowlton knew he had two choices. He could either prepare the video for delivery tomorrow as promised, or he could take it upstairs to the provost for a second opinion.

I already know his opinion, Knowlton thought, having never witnessed the provost take any action other than the one promised a client. He’ll tell me to upload this video to the world, no questions asked … and he’ll be furious at me for asking.

Knowlton returned his attention to the video, which he rewound to a particularly unsettling spot. He started the playback, and the eerily illuminated cavern reappeared accompanied by the sounds of lapping water. The humanoid shadow loomed on the dripping wall—a tall man with a long, birdlike beak.

In a muffled voice, the deformed shadow spoke:

These are the new Dark Ages.

Centuries ago, Europe was in the depths of its own misery—the population huddled, starving, mired in sin and hopelessness. They were as a congested forest, suffocated by deadwood, awaiting God’s lightning strike—the spark that would finally ignite the fire that would rage across the land and clear the deadwood, once again bringing sunshine to the healthy roots.

Culling is God’s Natural Order.

Ask yourself, What followed the Black Death?

We all know the answer.

The Renaissance.

Rebirth.

It has always been this way. Death is followed by birth.

To reach Paradise, man must pass through Inferno.

This, the master taught us.

And yet the silver-haired ignorant dares call me monster? Does she still not grasp the mathematics of the future? The horrors it will bring?

I am the Shade.

I am your salvation.

And so I stand, deep within this cavern, gazing out across the lagoon that reflects no stars. Here in this sunken palace, Inferno smolders beneath the waters.

Soon it will burst into flames.

And when it does, nothing on earth will be able to stop it.

CHAPTER 11

The object in Langdon’s hand felt surprisingly heavy for its size.

Slender and smooth, the polished metal cylinder was about six inches long and rounded at both ends, like a miniature torpedo.

“Before you handle that too roughly,” Sienna offered, “you may want to look at the other side.” She gave him a taut smile. “You say you’re a professor of symbols?”

Langdon refocused on the tube, turning it in his hands until a bright red symbol rolled into view, emblazoned on its side.

Instantly, his body tensed.

As a student of iconography, Langdon knew that precious few images had the power to instill instantaneous fear in the human mind … but the symbol before him definitely made the list. His reaction was visceral and immediate; he placed the tube on the table and slid back his chair.

Sienna nodded. “Yeah, that was my reaction, too.”

The marking on the tube was a simple trilateral icon.

This notorious symbol, Langdon had once read, was developed by Dow Chemical in the 1960s to replace an array of impotent warning graphics previously in use. Like all successful symbols, this one was simple, distinctive, and easy to reproduce. Cleverly conjuring associations with everything from crab pincers to ninja hurling knives, the modern “biohazard” symbol had become a global brand that conveyed danger in every language.

“This little canister is a biotube,” Sienna said. “Used for transporting dangerous substances. We see these occasionally in the medical field. Inside is a foam sleeve into which you can insert a specimen tube for safe transport. In this case …” She pointed to the biohazard symbol. “I’m guessing a deadly chemical agent … or maybe a … virus?” She paused. “The first Ebola samples were brought back from Africa in a tube similar to this one.”

This was not at all what Langdon wanted to hear. “What the hell is it doing in my jacket! I’m an art history professor; why am I carrying this thing?!”

Violent images of writhing bodies flashed through his mind … and hovering over them, the plague mask.

Very sorry … Very sorry.

“Wherever this came from,” Sienna said, “this is a very high-end unit. Lead-lined titanium. Virtually impenetrable, even to radiation. I’m guessing government issue.” She pointed to a postage-stamp-size black pad flanking the biohazard symbol. “Thumbprint recognition. Security in case it’s lost or stolen. Tubes like this can be opened only by a specified individual.”

Although Langdon sensed his mind now working at normal speed, he still felt as if he were struggling to catch up. I’ve been carrying a biometrically sealed canister.

“When I discovered this canister in your jacket, I wanted to show Dr. Marconi privately, but I didn’t have an opportunity before you woke up. I considered trying your thumb on the pad while you were unconscious, but I had no idea what was in the tube, and—”

“MY thumb?!” Langdon shook his head. “There’s no way this thing is programmed for me to open it. I don’t know anything about biochemistry. I’d never have anything like this.”

“Are you sure?”

Langdon was damned sure. He reached out and placed his thumb on the finger pad. Nothing happened. “See?! I told—”

The titanium tube clicked loudly, and Langdon yanked his hand back as if it had been burned. Holy shit. He stared at the canister as if it were about to unscrew itself and start emitting a deadly gas. After three seconds, it clicked again, apparently relocking itself.

Speechless, Langdon turned to Sienna.

The young doctor exhaled, looking unnerved. “Well, it seems pretty clear that the intended carrier is you.”

For Langdon, the entire scenario felt incongruous. “That’s impossible. First of all, how would I get this chunk of metal through airport security?”

“Maybe you flew in on a private jet? Or maybe it was given to you when you arrived in Italy?”

“Sienna, I need to call the consulate. Right away.”

“You don’t think we should open it first?”

Langdon had taken some ill-advised actions in his life, but opening a hazardous materials container in this woman’s kitchen would not be one of them. “I’m handing this thing over to the authorities. Now.”

Sienna pursed her lips, mulling over options. “Okay, but as soon as you make that call, you’re on your own. I can’t be involved. You definitely can’t meet them here. My immigration situation in Italy is … complicated.”

Langdon looked Sienna in the eye. “All I know, Sienna, is that you saved my life. I’ll handle this situation however you want me to handle it.”

She gave a grateful nod and walked over to the window, gazing down at the street below. “Okay, this is how we should do it.”

Sienna quickly outlined a plan. It was simple, clever, and safe.

Langdon waited as she turned on her cell phone’s caller-ID blocking and dialed. Her fingers were delicate and yet moved purposefully.

“Informazioni abbonati?” Sienna said, speaking in a flawless Italian accent. “Per favore, può darmi il numero del Consolato americano di Firenze?”

She waited and then quickly wrote down a phone number.

“Grazie mille,” she said, and hung up.