And I had sent them to their deaths. Not willingly, not knowingly, but the ultimate responsibility had been mine. This had all been my idea, my brain-child and mine alone, and I'd overridden all objections and fast-talked our very doubtful and highly sceptical chief into giving if not his enthusiastic approval at least his grudging consent. I'd told the two men, Baker and Delmont, that if they played it my way no harm would come to them so they'd trusted me blindly and played it my way and now they lay dead beside me. No hesitation, gentlemen, put your faith in me, only see to it that you make your wills first of all.

There was nothing more to be done here now. I'd sent two men to their deaths and that couldn't be undone. It was time to be gone.

I opened that outer door the way you'd open the door to a cellar you knew to be full of cobras and black widow spiders. The way you would open the door, that is: were cobras and black widow spiders all I had to contend with aboard that ship, I'd have gone through that door without a second thought, they were harmless and almost lovable little creatures compared to some specimens of homo sapiens that were loose on the decks of the freighter Nantesville that night.

With the door opened at its fullest extent I just stood there. I stood there for a long time without moving a muscle of body or limbs, breathing shallowly and evenly, and when you stand like that even a minute seems half a lifetime. All my being was in my ears. I just stood there and listened. I could hear die slap of waves against the hull, the occasional low metallic rumble as the Nantesville worked against wind and tide on its moorings, the low moan of the strengthening night wind in the rigging and, once, the far-off lonely call of a curlew. Lonesome sounds, safe sounds, sounds of the night and nature. Not the sounds I was listening for. Gradually, these sounds too became part of the silence. Foreign sounds, sounds of stealth and menace and danger, there were none. No sound of breathing, no slightest scrape of feet on steel decks, no rustle of clothing, nothing. If there was anyone waiting out there he was possessed of a patience and immobility that was superhuman and I wasn't worried about superhumans that night, just about humans, humans with knives and guns and chisels in their hands. Silently I stepped out over the storm sill.

I've never paddled along the night-time Orinoco in a dug-out canoe and had a thirty-foot anaconda drop from a tree, wrap a coil around my neck and start constricting me to death and what's more I don't have to go there now to describe the experience for I know exactly what it feels like. The sheer animal power, the feral ferocity of the pair of huge hands that closed round my neck from behind was terrifying, something I'd never known of, never dreamed of. After the first moment of blind panic and shocked paralysis, there was only one thought in my mind: it comes to us all and now it has come to me, someone who is cleverer and stronger and more ruthless than I am.

I lashed back with all the power of my right foot but the man behind me knew every rule in the book. His own right foot, travelling with even more speed and power than mine, smashed into the back of my swinging leg. It wasn't a man behind me, it was a centaur and he was shod with the biggest set of horseshoes I'd ever come across. My leg didn't just feel as if it had been broken, it felt as if it had been cut in half, I felt his left toe behind my left foot and stamped on it with every vicious ounce of power left me but when my foot came down his toe wasn't there any more. All I had on my feet was a pair of thin rubber swimming moccasins and the agonising jar from the steel deck plates shot clear to the top of my head. I reached up my hands to break his little fingers but he knew all about that too for his hands were clenched into iron-hard balls with the second knuckle grinding into the carotid artery. I wasn't the first man he'd strangled and unless I did something pretty quickly I wasn't going to be the last either. In my ears I could hear the hiss of compressed air escaping under high pressure and behind my eyes the shooting lines and flashes of colour were deepening and brightening by the moment.

What saved me in those first few seconds were he folded hood and thick rubberised canvas neck ruff of the scuba suit I was wearing under my coat. But it wasn't going to save me many seconds longer, the life's ambition of the character behind me seemed to be to make his knuckles meet in the middle of my neck. With the progress he was making that wouldn't take him too long, he was half-way there already.

I bent forward in a convulsive jerk. Half of his weight came on my back, that throttling grip not easing a fraction, and at the same time he moved his feet as far backwards as possible — the instinctive reaction to my move, he would have thought that I was making a grab for one of his legs. When I had him momentarily off-balance I swung round in a short arc till both our backs were towards the sea. I thrust backwards with all my strength, one, two, three steps, accelerating all the way. The Nantesville didn't boast of any fancy teak guardrails, just small-section chain, and the small of the strangler's back took our combined charging weights on the top chain.

If I'd taken that impact I'd have broken my back or slipped enough discs to keep an orthopaedic surgeon in steady employment for months. But no shouts of agony from this lad. No gasps, even. Not a whisper of sound. Maybe he was a deaf mute — I'd heard of several deaf mutes possessed of this phenomenal strength, part of nature's compensatory process, I suppose.

But he'd been forced to break his grip, to grab swiftly at the tipper chain to save us both from toppling over the side into the cold dark waters of Loch Houron. I thrust myself away and spun round to face him, my back against the radio office bulkhead. I needed that bulkhead, too — any support while my swimming head cleared and a semblance of life came back into my numbed right leg.

I could see him now as he straightened up from the guard-rail. Not clearly — it was too dark for that — but I could see the white blur of face and hands and the general outline of his body.

I'd expected some towering giant of a man, but he was no giant — unless my eyes weren't focusing properly, which was likely enough. From what I could see in the gloom he seemed a compact and well enough made figure, but that was all. He wasn't even as big as I was. Not that that meant a thing — George Hackenschmidt was a mere five foot nine and a paltry fourteen stone when he used to throw the Terrible Turk through the air like a football and prance around the training ring with eight hundred pounds of cement strapped to his back just to keep him in trim. I had no compunction or false pride about running from a smaller man and as far as this character was concerned the farther and faster the better. But not yet. My right leg wasn't up to it. I reached my hand behind my neck and brought the knife down, holding it in front of me, the blade in the palm of my hand so that he couldn't see the sheen of steel in the faint starlight.

He came at me calmly and purposefully, like a man who knew exactly what he intended to do and was in no doubt at all as to the outcome of his intended action. God knows I didn't doubt he had reason enough for his confidence. He came at me sideways so that my foot couldn't damage him, with his right hand extended at the full stretch of his arm. A one track mind. He was going for my throat again. I waited till his hand was inches from my face then jerked my own right hand violently upwards. Our hands smacked solidly together as die blade sliced cleanly through the centre of his palm.

He wasn't a deaf mute after all. Three short unprintable words, an unjustified slur on my ancestry, and he stepped quickly backwards, rubbed the back and front of his hand against his clothes then licked it in a queer animal-like gesture, He peered closely at the blood, black as ink in the starlight, welling from both sides of his hand.