‘I too am loyal to my friends. You know that. And he was one of them.’
‘My sailors speak of a Kingdom of Heaven on earth, that people with goodness and compassion can find it. Do you believe in this thing?’
Claudius started to speak, hesitated, then looked Pliny full in the face, his eyes moist and suddenly etched with his years. He reached out and touched his friend’s arm, then gave a small smile. ‘My dear Pliny. You forget yourself. I’m a god, remember? Gods have no need of heaven.’
Pliny smiled back, and bowed. ‘ Princeps.’
4
J ack and Costas hung weightless in the water eight metres below the Zodiac boat off south-east Sicily, their equipment reflecting the sunlight that shone as far down as the cliff base thirty metres below. Jack was floating a few metres away from the shotline, maintaining perfect buoyancy with his breathing and watching the extraordinary scene overhead. The Lynx helicopter from Seaquest II had arrived a few minutes before, and its deflected propwash created a perfect halo around the silhouette of the boat. Through the tunnel of calm in the middle, Jack could see the wavering forms of the two replacement divers who had been winched down to provide safety backup should anything go wrong. He could feel the vibration, the drumming of the propwash on the water, but the roaring of the engines was muffled by his helmet and communication headset. He had been listening to Costas giving instructions to the departing divers, a complex checklist that seemed to run through the entire IMU equipment store.
‘Okay, Jack,’ Costas said. ‘Andy says we’re good to go. I just wanted to get the logistics people moving on Seaquest II in case it’s showtime.’
His voice sounded oddly metallic through the intercom, a result of the modulator designed to counter the effects on the voice of helium in the gas mix. Jack tilted upright and finned back towards the shotline. The twin corrugated hoses of his regulator made him feel like a diver of Cousteau’s day, but the similarity ended there. As he approached Costas he cast a critical eye over the yellow console on his friend’s back, its contoured shell containing the closed-circuit rebreather with the cylinders of oxygen and trimix they needed for the dive. The corrugated hoses led to a helmet and full-face mask, allowing them to breathe and talk without the encumbrance of a mouthpiece.
‘Remember my briefing,’ Costas said. ‘Lights off, unless we find something.’
Jack nodded. With their eyes accustomed to the gloom, he knew they would have a greater range of vision for spotting a wreck mound than with the limited cone of light from a headlamp. ‘Dive profile?’ he asked.
‘Maximum depth eighty metres, maximum bottom time twenty-five minutes. We can go deeper, but I don’t want to risk it until Seaquest II ’s on station and the recompression chamber’s fired up. And remember your bailout.’ He pointed to the octopus regulator that could be fed into the helmet if the rebreather malfunctioned, bypassing the counterlung and tapping gas directly from the manifold on the cylinders.
‘Roger that. You’re the divemaster.’
‘I wish you’d remember that the next time you see treasure glinting at the bottom of the abyss. Or inside an iceberg.’ Costas pressed a control on his dive computer and then peered at Jack through his visor. ‘Just one thing before we go.’
‘What is it?’
‘You said anything that touches on the life of Jesus is like gold dust. People must have been searching for the shipwreck of St Paul since diving began, even before Cousteau. It’s one of the biggest prizes in archaeology. Why us?’
‘That’s what you said about Atlantis. A few lucky breaks and a little lateral thinking. That’s all I’ve ever needed.’
‘And a little help from your friends.’
‘And a little help from my friends.’ Jack grasped the dump valve on his buoyancy jacket. ‘Good to go?’
‘Good to go.’
Seconds later, Costas was hurtling down into the depths, approaching the dive in his customary way as if he were going over Niagara Falls in a barrel. Jack followed more gracefully, his arms and legs outstretched like a skydiver, exhilarated by the weightlessness and the panorama that was opening out below them, listening to the sound of his own breathing. It was exactly as he remembered it, every gully and ridge of the cliff base etched on his mind from twenty years before, from hours spent measuring and recording, poring over the wreck plan and working out where to excavate next. Costas was right about the technology. Underwater archaeology had advanced leaps and bounds in the past two decades, as if physics had progressed from Marie Curie to particle accelerators in a mere generation. Back then, measurements had been taken painstakingly by hand; now it was laser rangefinders and digital photogrammetry, using remote-operated vehicles rather than divers. What had taken months could now be achieved in a matter of days. Even the discomforts of diving were greatly reduced, the E-suits insulating them from the temperature drop at the thermocline. Yet with new diving technology greater depths beckoned, depths that brought new boundaries, new thresholds of danger. The cost was still there, the risks even greater. Jack was drawn on, always pushing the limits of exploration, but before committing others to follow in his wake he needed to be certain that the prize was worth it.
Directly below, he saw where Pete and Andy had anchored the shotline in the gully where he had found the sounding lead, and from there he saw a wavering line encrusted with algae extending down the slope into the depths. He stared at it, suddenly feeling in a time warp. It was the line he had paid out on his final dive all those years ago, still lying exactly where he had left it, as if the site had been waiting for him, unfinished. Costas had seen it too, and somehow brought himself to a halt before augering into the sea bed. He waited for Jack to reach him, then together they finned slowly side by side over the line until they reached the last plateau, fifty metres deep, the furthest point where amphoras had tumbled from the Roman shipwreck. As they swam over the plateau, a bar-like shape appeared below them in the silt, about two metres long with a rectangular aperture just visible in the centre.
‘My old friend.’ Jack tweaked the control on the side of his helmet to get his voice to sound normal. ‘It’s the lead Roman anchor shank I saw on my final dive, and there should be another identical one about fifty metres ahead, on the edge of the plateau. It’s exactly what you’d expect to see from a ship using two anchors to hold offshore, one paid out behind the other. We can use them to take a compass bearing.’
‘Roger that.’
They swam on over the line and soon saw the second shank just as Jack remembered it, wedged in a cleft above a dropoff. From there he could see the line tapering off, its end hanging over a ridge, the deepest he had dared to go on his final dive twenty years before. It was like the end of divers’ safety lines he had followed inside caves, haunting relics of extraordinary human endeavour that beckoned others to surpass them. Without pausing they passed beyond, and dropped down to the base of the rocky cliff where the sea bed became a featureless desert of sand. On the edge Jack saw a belt of corroded machine-gun cartridges, draped over a clip of larger cannon rounds from an anti-aircraft gun. He remembered seeing them before, relics of the Second World War. Costas slowed down, and reached for the dump valve on his buoyancy compensator.
‘Don’t even think about it,’ Jack said.
‘Just looking,’ Costas said hopefully, then finned away. Beyond them the sand seemed to extend to infinity, a blue-grey desert with no visible horizon. About fifty metres on they swam over a small outcrop of rock, then saw an undulation where the sand rose in a low dune. As they approached it looked more and more unnatural, like some sea creature lurking beneath the sediment, the undulation extending ten metres or more in either direction from a central hump with another ridge running at ninety degrees through it. Costas gave an audible intake of breath. ‘My God, Jack. It’s an aircraft!’