They hit another gate, this one heavier. It too was unlocked. The sound of St. Peter’s Square faded behind them now, and Langdon sensed they had passed through the outer wall of Vatican City. He wondered where inside the Vatican this ancient passage would conclude. In the gardens? In the basilica? In the papal residence?

Then, without warning, the tunnel ended.

The cumbrous door blocking their way was a thick wall of riveted iron. Even by the last flickers of his torch, Langdon could see that the portal was perfectly smooth—no handles, no knobs, no keyholes, no hinges. No entry.

He felt a surge of panic. In architect-speak, this rare kind of door was called a senza chiave—a one-way portal, used for security, and only operable from one side—the other side. Langdon’s hope dimmed to black… along with the torch in his hand.

He looked at his watch. Mickey glowed.

11:29 P.M.

With a scream of frustration, Langdon swung the torch and started pounding on the door.

113

Something was wrong.

Lieutenant Chartrand stood outside the Pope’s office and sensed in the uneasy stance of the soldier standing with him that they shared the same anxiety. The private meeting they were shielding, Rocher had said, could save the Vatican from destruction. So Chartrand wondered why his protective instincts were tingling. And why was Rocher acting so strangely?

Something definitely was awry.

Captain Rocher stood to Chartrand’s right, staring dead ahead, his sharp gaze uncharacteristically distant. Chartrand barely recognized the captain. Rocher had not been himself in the last hour. His decisions made no sense.

Someone should be present inside this meeting! Chartrand thought. He had heard Maximilian Kohler bolt the door after he entered. Why had Rocher permitted this?

But there was so much more bothering Chartrand. The cardinals. The cardinals were still locked in the Sistine Chapel. This was absolute insanity. The camerlegno had wanted them evacuated fifteen minutes ago! Rocher had overruled the decision and not informed the camerlegno. Chartrand had expressed concern, and Rocher had almost taken off his head. Chain of command was never questioned in the Swiss Guard, and Rocher was now top dog.

Half an hour, Rocher thought, discreetly checking his Swiss chronometer in the dim light of the candelabra lighting the hall. Please hurry.

Chartrand wished he could hear what was happening on the other side of the doors. Still, he knew there was no one he would rather have handling this crisis than the camerlegno. The man had been tested beyond reason tonight, and he had not flinched. He had confronted the problem head-on… truthful, candid, shining like an example to all. Chartrand felt proud right now to be a Catholic. The Illuminati had made a mistake when they challenged Camerlegno Ventresca.

At that moment, however, Chartrand’s thoughts were jolted by an unexpected sound. A banging. It was coming from down the hall. The pounding was distant and muffled, but incessant. Rocher looked up. The captain turned to Chartrand and motioned down the hall. Chartrand understood. He turned on his flashlight and took off to investigate.

The banging was more desperate now. Chartrand ran thirty yards down the corridor to an intersection. The noise seemed to be coming from around the corner, beyond the Sala Clementina. Chartrand felt perplexed. There was only one room back there—the Pope’s private library. His Holiness’s private library had been locked since the Pope’s death. Nobody could possibly be in there!

Chartrand hurried down the second corridor, turned another corner, and rushed to the library door. The wooden portico was diminutive, but it stood in the dark like a dour sentinel. The banging was coming from somewhere inside. Chartrand hesitated. He had never been inside the private library. Few had. No one was allowed in without an escort by the Pope himself.

Tentatively, Chartrand reached for the doorknob and turned. As he had imagined, the door was locked. He put his ear to the door. The banging was louder. Then he heard something else. Voices! Someone calling out!

He could not make out the words, but he could hear the panic in their shouts. Was someone trapped in the library? Had the Swiss Guard not properly evacuated the building? Chartrand hesitated, wondering if he should go back and consult Rocher. The hell with that. Chartrand had been trained to make decisions, and he would make one now. He pulled out his side arm and fired a single shot into the door latch. The wood exploded, and the door swung open.