installed so engineers could service the remaining attic space at this end.
“Looks like we’re walking the plank,” Langdon said, eyeing the narrow boards with uncertainty.
Sienna shrugged, unfazed. “No worse than Venice in flood season.”
Langdon realized she had a point. On his most recent research trip to Venice, St. Mark’s Square had been under a foot of water, and he had walked from the Hotel Danieli to the basilica on wooden planks propped between cinder blocks and inverted buckets. Of course, the prospect of possibly getting one’s loafers wet was a far cry from that of plunging through a Renaissance masterpiece to one’s death.
Pushing the thought from his mind, Langdon stepped out onto the narrow board with a feigned self-assurance that he hoped would calm any worries Sienna might secretly be harboring. Nonetheless, despite his confident exterior, his heart was pounding as he moved across the first plank. As he neared the middle, the plank bowed beneath his weight, creaking ominously. He pressed on, faster now, finally reaching the other side and the relative safety of the second strut.
Exhaling, Langdon turned to shine the light for Sienna and also offer any coaxing words she might need. She apparently needed none. As soon as his beam illuminated the plank, she was skimming along its length with remarkable dexterity. The board barely bent beneath her slender body, and within seconds she had joined him on the other side.
Encouraged, Langdon turned back and headed out across the next plank. Sienna waited until he had crossed and could turn around and shine the light for her, and then she followed, staying right with him. Settling into a steady rhythm, they pressed on—two figures moving one after the other by the light of a single flashlight. From somewhere beneath them, the sound of police walkie-talkies crackled up through the thin ceiling. Langdon permitted himself a faint smile. We’re hovering above the Hall of the Five Hundred, weightless and invisible.
“So, Robert,” Sienna whispered. “You said Ignazio told you where to find the mask?”
“He did … but in a kind of code.” Langdon quickly explained that Ignazio had apparently not wanted to blurt out the mask’s location on the answering machine, and so he had shared the information in a more cryptic manner. “He referenced paradise, which I assume is an allusion to the final section of The Divine Comedy. His exact words were ‘Paradise Twenty-five.’ ”
Sienna glanced up. “He must mean Canto Twenty-five.”
“I agree,” Langdon said. A canto was the rough equivalent of a chapter, the word harkening back to the oral tradition of “singing” epic poems. The Divine Comedy contained precisely one hundred cantos in all, divided into three sections.
Inferno 1–34
Purgatorio 1–33
Paradiso 1–33
Paradise Twenty-five, Langdon thought, wishing his eidetic memory were strong enough to recall the entire text. Not even close—we need to find a copy of the text.
“There’s more,” Langdon continued. “The last thing Ignazio said to me was: ‘The gates are open to you, but you must hurry.’ ” He paused, glancing back at Sienna. “Canto Twenty-five probably makes reference to a specific location here in Florence. Apparently, someplace with gates.”
Sienna frowned. “But this city probably has dozens of gates.”
“Yes, which is why we need to read Canto Twenty-five of Paradise.” He gave her a hopeful smile. “You don’t, by any chance, know the entire Divine Comedy by heart, do you?”
She gave him a dumb look. “Fourteen thousand lines of archaic Italian that I read as a kid?” She shook her head. “You’re the one with the freakish memory, Professor. I’m just a doctor.”
As they pressed on, Langdon found it sad somehow that Sienna, even after all they’d been through together, apparently still preferred to withhold the truth about her exceptional intellect. She’s just a doctor? Langdon had to chuckle. Most humble doctor on earth, he thought, recalling the clippings he’d read about her special skills—skills that, unfortunately but not surprisingly, did not include total recall of one of history’s longest epic poems.
In silence, they continued on, crossing several more beams. Finally, up ahead Langdon saw a heartening shape in the darkness. The viewing platform! The precarious planking on which they were walking led directly to a much sturdier structure with guardrails. If they climbed onto the platform, they could continue on along the walkway until they exited the garret through a doorway, which, as Langdon recalled, was very close to the Duke of Athens Stairway.
As they neared the platform, Langdon glanced down at the ceiling suspended eight feet below. So far all the