Al-Khatib looked at his watch with dismay. “It will be dark shortly, but there is a bright moon tonight.”

Then he saw the cold, determined look in Maria’s eyes and quickly backpedaled.

“Of course, if that is what you wish,” he stammered. “Do you have a car?”

He paid the bill, then the trio made their way down the street to the rental. Following al-Khatib’s directions, Maria drove around the southern end of the Old City, then turned north into the Kidron Valley. The Palestinian directed her to the fringe of an ancient Muslim cemetery, where Maria concealed the car behind an adjace

nt stone warehouse that was crumbling at the seams.

Their shadows disappeared under the approaching twilight as the Janissary removed a pickax and a bag filled with electric lanterns from the rear of the car. He and Maria then followed the Palestinian as he hopped over a low stone wall and wound his way through the dusty cemetery. The grounds were all but deserted at the late hour, but the group kept to the remote western section, well away from a mosque in the center and a side road to the east. The Janissary did his best to conceal the ax, hiding the business end under his arm as he walked.

To the east of them rose the Mount of Olives, dominated by a large Jewish cemetery and several churches and gardens. Rising from a hillside to their immediate west stood the towering stone wall that surrounded the Old City. Just over the wall was the original Temple Mount, now occupied by the al-Haram ash-Sharif, or Noble Sanctuary. At the center of the holy grounds was the Dome of the Rock, a towering structure that housed the stone upon which Abraham had prepared to sacrifice his son. In Islamic tradition, that rock was also deemed the departure point for Muhammad’s visit to heaven during his Night Journey, earmarked by his footprint in the stone. Maria could just make out the top of the Muslim shrine’s large gold dome, the towering structure appearing maple brown in the fading light.

Al-Khatib reached the simple marker of a Muslim Emir who’d died in the sixteenth century and turned left. Stepping to the end of an irregular row of grave sites, he began climbing the rocky hillside that rose sharply toward the Old City. Maria fumbled for a flashlight in her pack but kept it turned off, stumbling over rocks and scrub, until reaching a slight plateau, where al-Khatib slowed.

“We are close,” he whispered.

Flicking on his own penlight, he led them higher up the hill, stopping finally beside a pair of desert shrubs. Panting for breath, Maria noticed that both plants were actually dead, their roots wedged into a small mound of stones. Behind the dead shrubs was an orderly stack of limestone rocks.

“It is behind here,” al-Khatib said, waving his light toward the plants. He turned and nervously scanned up and down the hillside to ensure they were not being observed.

“There are occasional security patrols in this area,” he cautioned.

Maria pulled out the pair of night vision goggles and carefully scanned the surroundings. The nearby sounds of the city wafted down the valley, and a blanket of lights twinkled across the surrounding hills. But all was empty in the cemetery below.

“There is no one about,” she confirmed.

Al-Khatib nodded, then knelt down and began tossing the stones aside. When a small opening appeared, Maria ordered the Jannisary to assist. Together, the two men quickly cleared away a concealed entrance, exposing a narrow passageway almost five feet in height. After removing all of the obstructions, the Palestinian stood and rested.

“The aqueduct was actually quite small,” he said to Maria, circling his hands together in a tight diameter. “A good deal of digging was required to enlarge it.”

Maria looked at the man without pity as she considered the original construction history. The aqueduct opening found on the hillside was simply an outlet, she knew, for a much more elaborate engineering feat. Nearly two thousand years before, Roman engineers under Herod had constructed a series of aqueducts from the distant hills of Hebron, which brought fresh water to the town and the fortress of Antonia, built on the site of the Temple Mount. The aqueducts were all constructed by hand, by laborers much more fit than the pudgy Palestinian who stood before her, Maria thought.

She held her flashlight to the mouth of the passage and flicked it on. The light revealed a narrow tunnel that ran five feet into the hillside. In the rear, she could see the small aqueduct opening at floor level, which continued deeper into the dirt wall. The tunnel was cleanly carved, and Maria could see that al-Khatib had excavated it with some skill.

“You have done nice work,” she told him, turning off her light. Then she took the pickax from the Janissary and handed it to the Palestinian.

“I need you to dig another two or three feet,” she demanded.

The well-paid artifact hunter readily nodded, hoping for an additional bonus while curious as to the task at hand. Taking a lantern from the Janissary, he squeezed to the rear of the tunnel and began digging into the rocky wall. The Janissary stepped in behind him and with gloved hands began removing the loose dirt and chipped debris accumulating around al-Khatib’s feet.

As Maria stood watch near the entrance, al-Khatib labored steadily, swinging the ax for nearly twenty minutes straight and carving away several more feet of soil. Breathing hard, he laid a heavy stroke into the hillside, feeling an odd lightness through the ax’s handle. Yanking back the ax, he realized he had punched a hole through to an open space behind the wall of dirt. The startled Palestinian stopped and held up the lantern. He could see only a black expanse of emptiness through the small hole but marveled at the rush of cool air that flowed through it.

With renewed energy, he furiously attacked the barrier, quickly expanding the hole to man-size. Pushing the debris aside, he barreled through the opening with the lantern, stumbling into a wide, high-ceiling cavern.

“Praise be Allah,” he gasped, tossing the pickax aside as he gazed at the far walls.

They reflected alabaster white because of the electric lantern and revealed even rows of chisel marks. Al-Khatib’s trained eye recognized the rock as limestone, showing where large blocks had been cut and removed by hand.

“A quarry, like Zedekiah’s Cave,” he blurted as Maria and the Janissary entered with another pair of lanterns.

“Yes,” Maria replied. “Only this one was lost to history when the Second Temple was destroyed.”

Beneath the walls of the Old City, less than a mile away, was another vast cave, carved by slaves who chiseled limestone for Herod the Great’s many engineering projects. Its name was acquired from the last king of Judah, Zedekiah, who reportedly used it as a hiding place to escape the armies of Nebuchadnezzar.

With the added light, the trio could see that the quarry dispersed into multiple passages, extending like fingers of a hand into the darkness. Al-Khatib eyed a large main tunnel that stretched directly east as far as he could see.

“This must extend well under the Haram ash-Sharif,” he said uneasily.