Gray cleared his throat. “And I think inner is the key word here.” He waved Seichan to step back, to join him. “What do you see? Look at the whole pattern. Does it look familiar to you?”

Seichan stared for a single breath, then snapped, “I don’t know. What am I looking for?”

Gray sighed and stepped to the wall. He ran a finger along one of the cascades. “Look at the way it swirls down in spirals of broken helixes. Picture this section all by itself.”

Seichan squinted. “It looks almost biological.”

Gray nodded. “Follow the strands. Don’t they look like double helixes of DNA? Like a genetic map?”

Seichan remained doubtful. “Written in an angelic language?”

Gray stepped away, his eyes still on the wall. “Maybe. In fact, there was a scientific study that compared patterns in DNA code with patterns found in human languages. According to a Zipf ’s law — a statistical tool — all human languages show a specific pattern of repetitive word usage. Such as the frequency of the word the or a. Or the rarity of other words, like aardvark or elliptical. When you plot a graph comparing the popularity of words against the frequency of their usage, you get a straight line. And it’s the same whether English, Russian, or Chinese. All human languages produce the same linear pattern.”

“And DNA code?” Vigor asked, intrigued.

“It produced exactly the same pattern. Even in our junk DNA, which most scientists consider to be biological garbage. The study has been repeated and verified. For some reason, there is a language buried in our genetic code. We don’t know what it says. But—” Gray pointed at the wall. “That may be the written form of the language.”

Vigor ran a hand along the carving, breathless with awe. “It makes you wonder. Could Trithemius have tapped into that language during his meditations?” He straightened as another thought struck him. “And consider ancient Hebrew, how its characters are similar to angelic script. Could early written languages have somehow been derived from this, arising out of some inherent genetic memory? In fact, it makes you wonder if this language isn’t the Word of God, mapping out something greater in all of us.”

Vigor shifted his light, sweeping it to cover the breadth of the vast chamber. “But either way, all of this. All this angelic language. What is it telling us?”

“I think it’s a genetic blueprint,” Gray said.

“But a blueprint to what?” Seichan said.

“Probably a turtle,” Kowalski mumbled.

Vigor snorted at the man’s joke, but both Seichan and Gray reacted with surprise, glancing to the man with matching expressions of incredulity.

“What?” Vigor asked, sensing something important.

Gray stepped closer, dropping his voice. “I think he may be right.”

“I am?” Kowalski asked.

Gray expanded upon his theory of the cavern below. “The turtle’s shell represents the cave. But what about the turtle itself? According to the story, it represents an incarnation of Vishnu, an angelic being.” Gray waved to the wall. “And here is evidence of some strange biological process, some secret knowledge. Beyond merely a viral disease. I think the coding on the walls is some diary of that process. Possibly still incomplete.”

Vigor studied the wall, the blueprint.

Before they could contemplate it further, a commotion arose from above.

They shifted in a group back to the center. It looked as if the demolition team were close to finishing. Their leader had coiled all his charge wires and cinched them into an electronic detonator so they could blow it all from above.

Overhead, Vigor spotted a woman climbing down the ladder. It was difficult to discern her features through the glare of the sunlit shaft.

Still, Gray recognized her, stepping forward. “Lisa…?”

Farther above, near the lip to the shaft, Nasser appeared, accompanied by a frantic, half-naked woman. She fought forward, as if to throw herself into the pit, but she was restrained by the barrels of four rifles, kept at bay.

Vigor gaped up at her.

Dear God…

She glowed.

Her skin shone out from the shadows.

Impossible.

“Cover the eyes!” she screamed below, pointing an arm down into the pit. “Cover the eyes!”

Vigor could not comprehend what she was talking about.

Gray did. The commander swept from Vigor’s side, dragged up a tarp used by the demolition team, and tossed it over the sculpture’s eyes like a blindfold, cutting the flow of sunlight to the cavern below.

Up top, the woman collapsed as if the strings suspending her had been cut. She dropped to a slab of the broken altar.

Nasser frowned back at her.

Lisa stepped from the ladder and joined them. Her gaze remained above, but her words were for them all. “I’m sorry.”

Ten minutes later, Gray watched the last of Nasser’s men mount the ladder and climb up. Above, a ring of rifles pointed down at their group. The last satchel of demolition equipment vanished over the lip, hauled up on one of the two ropes. The other rope still dangled, taunting.

“Why are they leaving us down here?” Lisa asked.

Gray eyed the rigged sandstone face. “I think we’ve just become obsolete,” he mumbled.

Lisa remained quiet, then mumbled an apology. “I had no choice.”

She’d already explained her sudden, unexpected appearance. A desperate act, born out of the necessity for a cure. The attempt had to be risked…even if it meant delivering the cure into the hands of the Guild.

“And Monk,” Lisa said with a choke. “He gave his life…for this.”

“No.” Gray put an arm around Lisa’s shoulders. He couldn’t even acknowledge that reality. Not yet. “No. Monk got you all here. And as long as we’re alive, there’s still hope.”

Nasser returned to the edge of the pit. “We’re just about finished here,” he announced, not so much gloating as simply stating a matter of fact. With all the cards in his hand, he kept his tone cold and civil. “Monsignor, you mentioned earlier how the scientific trail and historical trail merged at these ruins. It appears you were most astute. Here we have the two halves of Sigma joined.” He waved below — then turned to Susan, who still sat in a stupefied slump, head hanging to her chest. “And it seems the Guild’s efforts have also joined. The survivor from the scientific trail here…and the source of the Judas Strain below.”

Gray slipped his arm from Lisa and stepped forward. “You may still need our help!” he called up, knowing it was a wasted breath.

“I’m sure we’ll manage. The Guild has abundant resources to fit these last pieces together. We’ve managed to reach this point, starting with only a few words in an ancient text. A text, I understand, that came into our possession because of your actions, Commander.”

Gray’s fist tightened. He should have burned the Dragon Court’s library when he’d had the chance.

“Of course, it was the Guild’s efforts afterward — through the employment of marine archaeologists and satellite imagery — that uncovered one of Marco’s sunken ships off the coast of Sumatra.”

It took Gray a moment to realize what Nasser was implying. “You found one of Polo’s ships?”

“And we were lucky. One of the keel beams, encased in insulating clay, still contained biological activity. But we couldn’t understand its full capacity without an in vitro trial, a real-world scenario.”

Gray felt his blood go cold. If Nasser was telling the truth, the outbreak at Christmas Island hadn’t been a matter of chance exposure. “You…you purposely contaminated Christmas Island.”

He glanced to Seichan for confirmation.

She would not meet his eyes.

Nasser continued. “From the study of sea currents and tidal patterns, it required just planting the beam off the coast and observing what happened. In fact, we were monitoring and collecting samples when our patient here stumbled onto the scene. She and her party. The first human subjects. Of course, the currents eventually carried the tide to the island. As planned. A perfect localized and contained scenario.”