“Hide,” he whispered.

They ducked down.

The rain battered the cottage. Valkyrie risked a look up at Skulduggery.

“What is it?” she whispered.

“It’s a box,” he whispered back.

“What kind of box?”

“A wooden one.”

She gave him a look. “OK, I’ll try this. Why are we hiding from a box?”

“We’re not. We’re hiding from what’s inside the box.”

“What’s in the box?”

“Is it a head?” Fletcher asked.

“It’s the Jitter Girls.”

He peeked out. Valkyrie raised herself up slightly so she could see over the windowsill. The wooden box sat there on the trail in the mud and the rain.

“Who are the Jitter Girls?” she asked.

“Triplets,” Skulduggery said. “Born in 1931. When they were six years old, something tried to get into this world through them.”

“Through them?”

“It planted seeds in their minds, changed them mentally and physically. It dragged them just out of step with our reality, tried to make them a conduit through which it could emerge.”

“What are we talking about here?” Fletcher asked. “A Faceless One?”

“No,” Skulduggery said, “I don’t think so. This was something else. Their parents panicked. Doctors couldn’t help. Remember, this was Ireland in the 1930s, cut off and isolated from a world that was advancing around it. Everyone thought the children were possessed by the devil. They tried exorcism after exorcism, but the girls just got worse. Then I was called.”

“Could you help?” Valkyrie asked. She took another peek. The box was still just a box.

“They were too far gone,” Skulduggery said. “They spent a year in agony, twisting and squealing while strapped to their beds in the asylum.”

“Good God.”

“Their parents came in every single day. They’d sing to them. Nursery rhymes and old Irish songs. There was nothing I could do. The thing, whatever it was that was using them, I think it realised its plan wasn’t going to work. So it retreated. It went away, left them alone. They died soon after.”

“That’s terrible.”

“It is.”

“And so how are they in that box out there?”

Skulduggery shrugged. “They came back, didn’t they? Any poor soul tortured like that isn’t going to rest easy. They have too much pain to deal with by themselves, so they need to spread it around. That’s what I think, anyway. The truth is nobody knows why they came back, or why they started killing people. But that’s what happened.”

“And they’re in the box because…?”

“Everyone needs a home.”

“I see. I’m not altogether sure, though, why we’re hiding from them. If they can fit into that small box, how dangerous can they be?”

“It looks like you’re going to see for yourself,” Skulduggery said, his voice dropping back to a whisper.

Valkyrie peeked.