Medusa

We came to water, a shallow flow over gravel, the bright green of aquatic plants, and at that point we could see the moon shining on the cliffs above us, a grey, very broken curtain of rock splattered with the black of cave entrances. Almost immediately the ground began to rise and we lost sight of them. We were moving across the steep side of the ravine, still following traces of a path. It reached a point where we could see the waters of the cove entrance black in shadow, then it doubled back on itself, steeper now as we moved out on to the detritus caused by weathering of the cliff face above. Once Petra stopped to point the torch I had lent her at skid marks on the surface of the scree. 'Looks as though a bed or a crate, something heavy, has been hauled up here. Did you notice the imprint of feet down in the bottom?'

She scrambled up the steep bend, following the path across loose stone until it reached the base of the cliff here there were bushes growing, the entrance to the cave above screened by a dense thicket. Again there were indications of recent use, twigs snapped, small branches bent back, and in the black hole of the entrance itself the dry dust of the floor was scuffed by feet. 'That's not me,' she said, flashing her torch.. 'I've only been into this cave once.' Again there were skid marks as though a box had been dragged along the ground. 'Watch the roof.' She went on ahead of me, the height of the cave gradually lessening until I had to stoop. The sides of it were very smooth. 'I'm not sure,' her voice echoed back at me, 'whether this has been scooped out by surface water making its way to the sea or by the sea itself.'

There were any number of caves around the coast, most of them well below sea level, some reached only by water-filled sumps or chimneys. Looking back at the moonlit half-circle of the entrance, I realised we were striking into the cliff at an oblique angle. We were also moving downwards. 'You've got to remember,' I said, 'that when the ice-caps and the glaciers melted at the end of the last ice age the level of the sea rose very considerably.'

'I know. The best of the caves are thirty to sixty feet down.'

'Is that what your diving friend says?'

'Bill Tanner? Yes. He says there's a marvellous one by Arenal d'en Castell, a sort of blue grotto, enormous. He's promised to take me down, sometime when I'm not fossicking around, as he calls it.'

I switched off my torch, looking back up the slope. The entrance was no longer visible, only the glimmer of moonlight on stone showing ghostly pale. The roof was getting very low, though at that point the walls had pulled back as though this were some sort of expansion chamber. Like the other caves in the Cales Coves area, the walls here were water-worn and the upper entrance high above sea level. It must have been formed at some period when the island's rainfall was very much greater than it was now. The pounding of the sea so far below could never have done it by air pressure alone.

'Here's the roof fall.' Petra's voice came to me distorted and booming. 'I'm just about there. But mind your head.' And then I heard her swear.

'What is it? Have you hurt yourself?' I snapped my torch on, swinging it to send the beam lancing ahead down the tunnel.

'No. Nothing like that.' She was crouched down, her torch on the left-hand wall. In front of her the cave appeared to have collapsed, loose rock piled almost to the roof, rubble everywhere.

'What is it then?' I scrambled down the slope.

'Look! It's gone. The bastards have put their bloody shovels right across it. They've scraped it clean away. Why did they have to enlarge the hole?' She was leaning forward, brushing at the rock face with her fingers, the fine limestone dust sifting on to the stone below and almost white in the torchlight. She sat back on her haunches, cursing softly under her breath. 'If only I'd sent you a message and come straight back here and waited. When do you think they did it?'

She turned her torch on the fallen roof and the gap that showed between the broken rock and the rubble below was about three feet wide and not more than two feet at the highest point. There was air coming through it. I could feel it cool on my face and there was a smell of the sea. 'I should have come back,' she said again. 'Knowing somebody had been working on this fall, I should have stayed here to explain to them how important that drawing was.'

I tried to tell her not to worry about it too much. This is quite an extensive roof fall. Get this rubble shifted and you may find more drawings as you expose the rest of the cave walls.' It wasn't the cave drawing that interested me, though I realised the loss of it meant a lot to her, it was the fact that a passage had been cleared through the roof fall. It wasn't only that I could smell salt water, I could hear it, the slop of wavelets on the rocks in the cove or against the base of the cliffs. 'I'm going through,' I said.

'No.' Her hand gripped my arm. 'It's dangerous.'

Don't you want to know what's the other side, why they've been digging away at this roof fall?'

'Well, of course I do.' We were crouched together in what was clearly another expansion chamber, and as I circled it with my torch I saw that all the rubble they had cleared from the fall had been piled around the walls. Petra was straining at a large chunk of rock. 'Give me a hand, will you?' But when we had pulled it away, and she had cleared the rubble and dust that was piled behind it, exposing another foot or so of the limestone wall, there was nothing there, the surface completely bare. Her frustration and anger was something tangible. I could feel it as she shifted her body into the gap, kneeling now and working away at the rubble, dust rising in a cloud as she scooped the loose fragments of rock up in her hands and thrust them behind her.

'Leave it till tomorrow,' I said.

'No. I must know what's here.'

'In the morning you can come back again with the proper tools.'

'I must know,' she repeated, her voice urgent. 'If there are more drawings, then I'll have to stay here, make certain they don't start shovelling out more of this debris. If they come here again in the morning and begin enlarging the passage through this roof fall — '

'Listen!'

'What?'

'Just stay still for a moment.' She had been working so furiously, making such a clatter in the confined space, that I couldn't be certain I had really heard it. 'Listen!' I said again and she sat back on her haunches. Dust blew up into our faces, and in the sudden silence the slap of waves breaking seemed preternaturally loud.

'The wind's getting up,' she whispered. 'That's all.' And then, when I didn't say anything, all my senses concentrated on listening for that sound again, she asked, 'Did you hear something besides the wind and the sea?'

I nodded.

'What?'

'A voice. I thought I heard a voice.'

'Are you sure?'

'No. Of course I'm not sure.'

We stayed frozen for a while, listening. 'There's nothing,' she said. 'Just the wind. I can feel it on my face, much stronger now.'

I could feel it, too. It was as though a door had been opened and was letting in a draught. She bent forward again, working at a rock up-ended against the side of the cave. My torch, probing the hole through the roof fall, picked out a grey sliver of what proved to be bone. But when I showed it to her she brushed it aside. 'There are several bits of bone lying around. A sheep, or a goat maybe. Probably got trapped in here, or came seeking a dark den in which to die. It's drawings of animals, not their bones I'm looking for.' And when I again suggested that she leave it till it was daylight, she turned on me quite fiercely. 'Can't you understand? I must be sure there are no more drawings in danger of being destroyed.'

Five minutes later she was uncovering a mark on the wall that looked like discoloration. It was very faint, a faded ochre line sweeping upwards and stopping abruptly where the roof had fallen away. 'Could be the back of some animal.' Her voice was breathless with excitement. 'What do you think it is, Mike? The arch of the neck perhaps? A bull? At Lascaux there's a great bull right across the roof of the cave, and there are deer being hunted and plunging to their deaths over a cliff.'