She sipped her wine and looked up at the stars. Whatever discomforts there might be from being out in the field, far from civilization, being able to appreciate the full beauty and majesty of the heavens was-

“Bloody hell, I’m stuffed,” said Chase, clomping up behind her. Castille followed, nibbling a guava. “What’re you up to, Doc? Come out here to let one off in private?”

“No,” she said. “I wanted to look at the stars.”

Chase looked up. “Oh, yeah. Pretty good.”

“Is that all you’ve got to say?” Nina tutted. “You’re in the middle of the Amazon jungle, with the most incredible sky overhead, and the best you can come up with is ‘pretty good’?”

“What do you expect?” said Castille. “He is English, he thinks poetry”-he exaggeratedly pronounced it poe-ee-tree-“is a kind of tree, something you chop down to make toilet seats!” Nina laughed.

“Actually, I said it was pretty good because I’ve seen better,” Chase told her, for once seeming a little offended himself. “In Algeria. Out in the desert in the Grand Erg. Not a single light for fifty miles, and the air was so clear I could see every single star in the sky. Even went out from the camp and lay on a rock for half an hour just staring up at it all. Amazing.”

“Really?” Chase had never struck Nina as the type for stargazing.

“When were you in Algeria?” Castille asked suspiciously.

“Four years back. You know, when I had words with that gun-runner. Fekkesh, or whatever his name was.”

“Ah! So that’s what happened to him. Did they ever find his-”

“So you see, Doc,” Chase interrupted quickly, “I can appreciate a good sky as much as anyone. I’ve been all over the world-I know natural beauty when I see it.”

He was looking directly at Nina as he spoke. She turned to face the river, hoping he wouldn’t notice her cheeks flushing. “Sorry. I didn’t mean to imply that you were some sort of, well…”

“Crude, rude, bad-mannered yob from Yorkshire?”

“I never said yob!”

Chase chuckled. “Here, check this out.” He reached around her to a box on the side of the deck, pressing against her as he took a flashlight from it. “Hugo, give me that.”

“Hoy!” Castille protested as the guava was snatched from his hand. Chase tossed the half-eaten fruit out into the river, where it landed with a soft splash. More splashes suddenly echoed from the darkness.

“Watch this,” Chase told Nina, leaning close to her again as he shone the flashlight out across the dark water. As if from nowhere, dozens of pairs of yellow lights glinted back at them like gemstones from the surface of the river.

“What are they?” Nina asked, just as one of the pairs of lights blinked. She gasped, instinctively backing against Chase.

“Crocs,” he said. “Or maybe caimans, I can never remember the difference.” He lifted his other hand to point at them, holding Nina between the solid muscle of his arms. Her breath caught for a moment. “See how they’re swimming along really slow just below the surface, pretending they’re not actually moving? I’ve seen these buggers close up. They’re really patient. They’ll wait as long as it takes for something to get into range, and then…”

Seeing all the eyes watching her so coldly made Nina very nervous. “Are we safe?”

“As long as they don’t figure out how to climb the ladder from the boat deck, yeah. But there’s probably loads more on the other side as well. Just thought I’d show you in case you were planning any midnight skinny-dipping.”

“Hardly,” she huffed, stepping away from him.

Chase slowly panned the beam of the flashlight around the rear of the boat, more sinister eyes reflecting it back at the observers. “Even without this lot, I wouldn’t recommend swimming anyway. There’s probably piranhas too-and that nasty little bastard that swims up your pisshole if you take a leak in the water.”

“I was hardly planning to do that.”

“Nah, you’re too classy, I suppose.” Chase switched off the flashlight, then let out a very loud fart. “Ah, that’s better. Been waiting to do that since the main course.”

“God!” said Nina, both disgusted and-she had to admit-amused.

“Better make sure I didn’t follow through!” He handed the flashlight to Nina, then padded back into the main cabin.

She blew out her cheeks. “God, what is wrong with him?”

“It’s just his way,” Castille assured her, leaning on the railing.

“Well, I wish it wasn’t. Why does he have to be so… gross?”

To her surprise, Castille almost sighed. “It’s a defense mechanism, I’m afraid. He tries not to get too close to his clients. Especially when they are… well…” He nodded at her. “Attractive women. But he wasn’t always like that. When I first met him, when he was in the SAS, he was always… what’s the word?”

“Polite?”

“Chivalrous, that’s it.”

“So what happened?” Nina asked.

Castille looked pained. “It’s not really for me to say.”

“Well you started it! What happened?”

“Ai, I shouldn’t have said anything… Promise me you won’t tell him I told you?” Nina nodded. “He… he once fell in love with a woman he was supposed to protect.”

“What happened?” She already thought she knew. “Did she… die?”

Castille snorted. “Of course not! Edward is not so incompetent. No, he married her.”

“He was married?” That wasn’t a possibility she had imagined.

“Yes. But… it did not last long. They were very different people, and she did not treat him well. And then she, ah…” He glanced at the cabin door, lowering his voice. “She had an affair. With… Jason Starkman.”

“What!” Nina exclaimed. “You mean the same guy that tried to…”

Castille nodded. “We used to work together in joint operations for NATO. Jason was a friend-maybe even Edward’s best friend, at the time. Then Jason disappears to join with Qobras for whatever mad reason, and then Edward learns the truth… It was not a good time. He thought he had been betrayed by everyone he trusted.”

“Except you.”

“Ah, if Edward did not trust me, who would keep him out of trouble?” The moment had passed; it was obvious to Nina that Castille was not about to return to the subject.

She looked out over the river again, this time with the knowledge that she was being watched herself. The idea gave her a chill. Finishing her wine, she hurried back into the safety of the cabin.

TWELVE

The Nereid raised its anchor shortly after dawn, resuming its snaking voyage upriver. But the boat’s passage was so smooth that Nina didn’t wake up. It wasn’t until the scent of breakfast permeated her luxurious cabin that she stirred.

After washing and getting dressed, she made her way up to the bridge. Kari was there with Chase and Perez, studying a picture on her laptop. Julio smoothly guided the craft through the river’s sweeping turns.

“Morning, sunshine,” said Chase.

“Hiya. What’s up?”

“We’ve been sent the latest aerial photos of the search zone,” Kari said, turning the laptop to face Nina. The curves and twists of the river on the screen were even more pronounced, like a child’s doodle. In places, the Tefé even looped back on itself, creating circular islands surrounded by a natural moat. “There are four areas that are the most likely sites for the city, based on the terrain.”

Nina examined the image. The vivid green of the jungle canopy was more broken in the new, higher-resolution photo, revealing tantalizing hints of the shadowed world beneath. She zoomed in on one of the four marked sections until it pixelated. A gray smudge lurked in a gap between the trees. “Could that… could that be a ruin under there?”

“Could be,” said Chase. “Or it could just be a rock. This kind of jungle, you could hide an aircraft carrier under it and not be sure what you were looking at from the air. Only way to be sure is to get boots in the mud.”