'Hell, what other way is there?' he asked, still spoiling for a fight. There was a growl of approval from most of our crew. I felt as they did, but I had to stop them.

'Look. Hadley's run mad and there's no knowing what he'll do next. But I'll bet those Spaniards over there are even more scared of him than we are. I think Ramirez will have him dealt with, for their own safety.'

Geordie's face was still shuttered and frozen. He wasn't going to listen. Then Campbell said, 'Don't forget we're drifting now. You slipped the anchor.'

And that brought Geordie fully to his senses. He frowned, and it was an expression of worry that was far healthier for all of us than his glare of bitter hatred. 'Christ, yes! We could drift right into that thing. We've got to get the foremast right out of its housing, clear the shrouds, the lot. Dump it all overboard. It'll hamper Sirena if she tries to give chase. Taffy – Nick' His voice rose in command.

The men gathered round, grasping their weapons and waiting for him to order them into battle. Instead he began to give firm orders for freeing Esmerelda, and they recognized the urgency and sense in his voice. The fighting craze began to leave them all.

I turned to Clare. 'Are you all right?' I asked quietly.

'Better now, darling.'

But even now there wasn't time for more than that one quick moment of comfort. 'Where are Paula and Mark?' I asked her.

She nodded towards the saloon. They're still in there. He's not too seriously hurt. He was sitting in a chair the last time I looked in. But he won't give us any trouble, Mike. I've never seen him so subdued.'

There are all the signs that Falcon will get rougher soon. I want you to get both of them up on deck – it'll be safer than staying below. And stay with your father, Clare. Keep them all together.' I kissed her and then she went into the saloon without a word.

Geordie and the men had gone up on deck and I followed. On board Sirena there was frantic activity as men wrenched and struggled with equipment at the base of the foremast. A similar scene was being enacted on our ship. There was no shooting, and of Hadley there was no sign. With any luck they had killed him themselves. I had a brief glimpse of our motor launch, still attached and dancing wildly astern, of the litter strewn on deck, of Jim's body being passed below. I started to go forward and make myself useful.

And then Falcon blew.

There was a mighty roar as thousands of tons of water exploded into superheated steam. A bright flickering glare shone on us and the sunlight was dimmed as a pillar of steam ascended into the sky.

The first wave reached us in less than fifteen seconds. As I staggered, grabbing for support, I saw it racing down towards Esmerelda, silhouetted against the raging furnace. It was a monstrous wave, rearing mast high, creamed with dirty grey spume and coming with the speed of an express train.

I crouched on the open deck, trying to flatten myself into the planking.

The wave broke against Esmerelda. She heaved convulsively and ground against Sirena. There was a rending crash and I thought that both ships must have been stove in. A flood of near scalding water washed over the deck, and I writhed as I felt it in the stab wound in my side.

Then the wave was past us and the ships dipped in the afterwash, creaking and groaning in every timber. There were four more huge waves, but none as high as the first. I staggered to my feet, feeling the ships' curious writhing motion on the water.

The waves had done what we had failed to do. Sirena was dipping and bobbing in the water about fifty yards away from us. Esmerelda was free, and she had no foremast at all. It had been plucked out by the roots.

But every time Sirena rolled there was a crash which sent a shudder through her. I stumbled to the side and looked down into the water. Our foremast hung there, still tethered to Sirena's mast by a cat's cradle of lines and spars. As I watched a surge of water sent it slamming against her hull like a battering ram and she shivered from stem to stern. She wouldn't stand much more of that treatment.

I fell over a body lying in the scuppers. Nick lay there with blood oozing from a wound in his forehead, but as I turned him over he groaned and stirred and opened his eyes. He must have had a constitution like an ox because, in spite of the massive contusion, he began to struggle to his feet at once.

I shouted, 'Let's look for the others!' and he nodded. We turned and then stood frozen in amazement as we caught a glimpse of Falcon.

There was land back there. Land that glowed a dull red shot with fiery gold streaks and which surrounded the pit of Hell itself – a vast incandescent crater which spewed forth red hot cinders and streams of lava. Falcon was building an island once more.

The sea fought the new land but the land was winning. Nothing could stop the outpouring of that huge gaping red mouth, but the sea did its best, pitting water against fire, and the result was an inferno of noise. There was a great ear-splitting hiss as though all the engines of the world were letting off steam together, and under that a rumbling bass from the depths of the chasm.

Great gouts of fire leapt up from the crater, half hidden behind the red mist, and the water boiled as it encountered from the blazing heat of the new Fonua Fo'ou. There was the sound of surf pounding along a reef, but such surf as none of us had ever seen before. Mighty columns of tephra, all the pent-up material that Falcon could fling into the air from its huge maw, seethed and erupted in spasms, hurling ash, magma and boulders high into the sky. A hazy brown cloud of fragmentary pumice hung over all, obscuring the sun.

Esmerelda was pitching as helplessly as Sirena. Black figures moved on both decks, outlined against the red glow of Falcon, and I felt a great leap of relief. For a moment it had seemed that Nick and I were the only two creatures alive. I hoped to God that Clare was safe.

Nick's eyes were glazed, not in fear but in awe. He was tougher and far better trained for danger than I, but I had one great advantage. I knew what was happening across the water, and my knowledge helped steady me. I shook him roughly and consciousness crept back into his face. He breathed deeply and then led the way across the littered deck.

On Sirena a ship's boat dangled from one davit. Clearly some of the crew had tried to get away, but those terrible waves would have made nothing of their chances. One of the falls had parted and the men must all have been tipped into the sea.

As we made our way forward, incongruously, it began to snow. The flakes came drifting from the sky, featherlike, to settle everywhere. I brushed one from my shoulder; it was a flake of ash. The air was becoming poisonous with fumes, the increased stink of sulphur and the worse stench of sulphuretted hydrogen. I looked at the sea. It was bubbling like a mud pool. Great fat bubbles were coming up from the sea-bed and breaking on the surface, adding a dangerous smoke to the haze of steam. I realised with sick horror that we were not drifting closer to the source of the eruption- it was expanding under the sea, coming to meet us.* 3*

There was a shattering roar from Falcon as a second vent opened, only a few hundred yards away from the two ships. The waves this time weren't as massive as before; this was a smaller vent. We clung to handholds during the first swamping rush of hot steamy water and then emerged gasping into the foetid air. Nick was nursing one arm and my rib-cage was alive with pain, but we'd survived. Figures struggled to their feet on our foredeck, and I recognised Ian's bulk among them, and then Geordie.

Sirena lurched and wallowed in the turmoil of the sea. Then she began to spin as Esmerelda had done when we first reached Falcon. The eddy that caught her moved on and after a few turns she steadied up again, still dragging the wreckage of our mast.