Across the lake to the south, another hill was dotted with even more impressive buildings—temples, Percy guessed. Several stone bridges crossed the river as it wound through the valley, and in the north, a long line of brickwork arches stretched from the hills into the town. Percy thought it looked like an elevated train track. Then he realized it must be an aqueduct.
The strangest part of the valley was right below him. About two hundred yards away, just across the river, was some sort of military encampment. It was about a quarter mile square, with earthen ramparts on all four sides, the tops lined with sharpened spikes. Outside the walls ran a dry moat, also studded with spikes. Wooden watchtowers rose at each corner, manned by sentries with oversized, mounted crossbows. Purple banners hung from the towers. A wide gateway opened on the far side of camp, leading toward the city. A narrower gate stood closed on the riverbank side. Inside, the fortress bustled with activity: dozens of kids going to and from barracks, carrying weapons, polishing armor. Percy heard the clank of hammers at a forge and smelled meat cooking over a fire.
Something about this place felt very familiar, yet not quite right.
“Camp Jupiter,” Frank said. “We’ll be safe once—”
Footsteps echoed in the tunnel behind them. Hazel burst into the light. She was covered with stone dust and breathing hard. She’d lost her helmet, so her curly brown hair fell around her shoulders. Her armor had long slash marks in front from the claws of a gorgon. One of the monsters had tagged her with a 50% off sticker.
“I slowed them down,” she said. “But they’ll be here any second.”
Frank cursed. “We have to get across the river.”
June squeezed Percy’s neck tighter. “Oh, yes, please. I can’t get my dress wet.”
Percy bit his tongue. If this lady was a goddess, she must’ve been the goddess of smelly, heavy, useless hippies. But he’d come this far. He’d better keep lugging her along.
It’s a kindness, she’d said. And if you don’t, the gods will die, the world we know will perish, and everyone from your old life will be destroyed.
If this was a test, he couldn’t afford to get an F.
He stumbled a few times as they ran for the river. Frank and Hazel kept him on his feet.
They reached the riverbank, and Percy stopped to catch his breath. The current was fast, but the river didn’t look deep. Only a stone’s throw across stood the gates of the fort.
“Go, Hazel.” Frank nocked two arrows at once. “Escort Percy so the sentries don’t shoot him. It’s my turn to hold off the baddies.”
Hazel nodded and waded into the stream.
Percy started to follow, but something made him hesitate. Usually he loved the water, but this river seemed…powerful, and not necessarily friendly.
“The Little Tiber,” said June sympathetically. “It flows with the power of the original Tiber, river of the empire. This is your last chance to back out, child. The mark of Achilles is a Greek blessing. You can’t retain it if you cross into Roman territory. The Tiber will wash it away.”
Percy was too exhausted to understand all that, but he got the main point. “If I cross, I won’t have iron skin anymore?”
June smiled. “So what will it be? Safety, or a future of pain and possibility?”
Behind him, the gorgons screeched as they flew from the tunnel. Frank let his arrows fly.
From the middle of the river, Hazel yelled, “Percy, come on!”
Up on the watchtowers, horns blew. The sentries shouted and swiveled their crossbows toward the gorgons.
Annabeth, Percy thought. He forged into the river. It was icy cold, much swifter than he’d imagined, but that didn’t bother him. New strength surged through his limbs. His senses tingled like he’d been injected with caffeine. He reached the other side and put the old woman down as the camp’s gates opened. Dozens of kids in armor poured out.
Hazel turned with a relieved smile. Then she looked over Percy’s shoulder, and her expression changed to horror. “Frank!”
Frank was halfway across the river when the gorgons caught him. They swooped out of the sky and grabbed him by either arm. He screamed in pain as their claws dug into his skin.
The sentries yelled, but Percy knew they couldn’t get a clear shot. They’d end up killing Frank. The other kids drew swords and got ready to charge into the water, but they’d be too late.
There was only one way.
Percy thrust out his hands. An intense tugging sensation filled his gut, and the Tiber obeyed his will. The river surged. Whirlpools formed on either side of Frank. Giant watery hands erupted from the stream, copying Percy’s movements. The giant hands grabbed the gorgons, who dropped Frank in surprise. Then the hands lifted the squawking monsters in a liquid vise grip.