Monk lowered his head. When he raised it again the gargoyle face was unreadable.
'Let's get her out.'
I used one of the bottles of smelling salts to rouse Sophie. She moaned in protest, trying to move her head away. The ammonia was a temporary measure at best, but it wouldn't make her any worse. And I needed her as aware as possible.
We didn't have much time.
There was always a risk of haematoma after a head trauma. Some developed very quickly, others could take weeks, slowly swelling blood blisters inside the skull that put pressure on the brain. Sophie's must have been building up for days. Either it had been too small to be detected by the hospital scans or she'd discharged herself before anyone had picked it up.
Either way I should have realized. The signs had been staring me in the face, and I'd missed them. I'd put her slurred speech down to alcohol and fatigue, dismissed her headache as a hangover.
Now she could die because of me.
Sophie barely knew where she was. She could walk, but not without support. By the time Monk had helped me manhandle her from the chamber it was obvious we wouldn't be able to go back the way we had come, with its narrow tunnels and crawlways.
'Is there another way out?' I asked as she slumped against me.
In the torchlight Monk looked terrifying, but I was more frightened for Sophie now than of him. His breathing sounded worse than ever. 'There is, but…'
'What?'
'Doesn't matter,' he said, and set off down the passage.
The world shrank down to the rough rock above me and on either side, and Monk's broad shoulders in front. I'd brought the torch from the floor of the chamber. The beam was weak but at least it threw back the darkness enough to see where we were going. If I fell now I'd drag Sophie down with me.
I had my arm around her, taking as much of her weight as I could. She was weeping with pain, her voice weak and slurred as she begged me to let her lie down and sleep. When she started to flag too much I held the smelling salts under her nose, trying not to think what would happen if she collapsed down here. Or that both our lives depended on a killer we'd no reason to trust.
Away from the airless warmth of the chamber it was freezing. My teeth chattered from the cold, and Sophie was shivering beneath my arm. Water streamed along the uneven floor of the passage. I thought about the stories I'd heard of cavers drowning in flooded tunnels. There had been a lot of rain over the last few weeks, but I told myself that Monk knew what he was doing.
The walls of the passage opened out into a vaulted cavern, where a fine, cold haze filled the air with a mineral tang. In the confined space the sound of falling water was deafening. The light from the torch showed it pouring down the rock walls, shattering into cascades before tumbling into the turmoil of a pool. Nearly all of the cavern was flooded, but Monk picked his way along a bank of shale that skirted its edge. At the far side the rock was split by a narrow vertical fissure, just above the water level. My heart sank when he stopped by it.
'Through there.'
He had to raise his voice to be heard above the water. Supporting Sophie, I shone the torch into the fissure. If anything it narrowed even more the further in it went.
'Where does it go?'
'Comes out in a passage that goes to the surface.' I could hear the wet tear of Monk's breathing even over the splash of the water. In the low torchlight the misshapen bones of his face made him look like a walking corpse.
'Are you sure?'
'You wanted another way out. That's it.'
With that he turned and started back along the shale bank, sloshing through the edge of the water. 'You're not just going to leave us?' I yelled after him.
There was no response. The torch beam bobbed as he made his way back across the flooded cavern. The level had risen while we'd been standing there.
'David… wha's…'
Sophie was leaning heavily against me. I swallowed the fear that had risen in my throat. 'It's OK. Not much further.'
I'd no idea if that was true or not. But we'd no choice. Shining the torch ahead of us, I hugged her to me and edged sideways into the narrow gap. It disappeared into darkness above our heads, but there wasn't much more than eighteen inches clearance between the rock faces. I fought down a wave of claustrophobia as they seemed to squeeze tighter with each shuffling step.
My breath steamed in the weak light from the torch. Its pale beam showed where the fissure twisted out of sight further along. After a few yards I looked back but the flooded cavern was already lost from view. Not that we could have gone back now anyway. There was no room to turn round, and I couldn't back up with Sophie tucked under my arm. I was almost dragging her now, struggling to support her as I took one crablike step after another.
How much further? I told myself it couldn't be far. The fissure was growing narrower, the sides pressing in closer the deeper we went. I could feel it, solid and unyielding against my chest, restricting my breathing. Don't think about it. Just keep moving. But even that was becoming more difficult. The irregular rock underfoot threatened to trip me and the gap continued to narrow. There wasn't enough room for us both to get through, not while I was holding Sophie.
I willed myself to stay calm. 'Sophie, I've got to free my arm. I need you to stand by yourself for a few seconds.'
My voice echoed oddly, flattened by the rock. She didn't respond.
'Sophie? Come on, wake up!'
But Sophie didn't move. Now I'd stopped she was a dead weight against me, and it was growing harder to hold her upright. If not for the walls of the fissure holding her in place I doubt I could have. I groped one-handed for the bottle of smelling salts in my pocket, desperate not to drop either them or the torch. I opened the bottle with my teeth, my eyes watering from the reek of ammonia even though I held my breath, then struggled to reach around to hold it under Sophie's nose. Come on. Please.
There was no reaction. I tried for a little longer, then gave up. OK, don't panic. Think. The only option was for me to squeeze through the narrow section first and somehow pull her through after me. But if I let go of her and she collapsed…
There's no room for her to fall, and you can't stay here. Just do it! My arm was growing numb. I began trying to ease it from beneath her shoulders. You can do it. Nice and easy. My coat sleeve rasped on the rough rock but Sophie's weight pinned me in place. No matter how hard I tried I couldn't prise myself loose. I twisted round to get more leverage and felt the rock faces clamp around my upper body like a vice. For a second I couldn't move, then I wrenched myself back to my original position, skinning my knuckles in the process.
Oh, God! I closed my eyes, fighting for breath. There didn't seem to be enough air. Stars sparked in my vision. I tried to steady my breathing, realizing I was starting to hyperventilate. For Christ's sake don't pass out! Gradually, my heart slowed. I opened my eyes. Lit by the torch from below, the rock wall was inches from my face. I could see its granular texture, smell its damp, salty hardness. I moistened my dry lips. Come on, think! But I didn't have any options left. My arm felt completely dead. Sophie was unconscious, wedged against me more tightly than ever. I couldn't go any further, nor could I back out, not with her blocking the way.
We were trapped.
There was a glow off to one side. I looked over Sophie's head and saw a torch beam lighting the fissure behind us, throwing the irregularities of the rock into sharp relief. There was a slow scraping, accompanied by the rasp of laboured breathing.
Then Monk edged into view. He was jammed sideways into the narrow gap, mouth contorted as he forced himself towards us. It had been tight enough for me: I couldn't imagine what it must be like for him.
He didn't speak until he'd reached Sophie. Still holding the torch, a massive hand snaked out and gripped her shoulder.