The water level was around my neck. I took half a dozen deep whooping breaths, enough to ease the fire in my lungs and the roaring and hissing and dizziness in my head to tolerable levels, then pushed myself backwards and upwards to the extreme limit of the fuselage. The water was at chest level now, I moved a hand around in the blind darkness to try to estimate the amount of air available to me. Impossible to judge accurately, but enough, I guessed, compressed as it was, to last for ten to fifteen minutes.
I moved across to the left of the fuselage, took a deep breath and pushed myself forwards and downwards. Eight feet behind the pilot’s seat was the passenger door, maybe I could force that. I found it right away, not the door but the opening where the door had been. The impact that had jammed the door on the righthand side where I’d been had burst this door open. I pushed myself back to the upper part of the fuselage again and helped myself to a few more deep breaths of that compressed air. It didn’t taste quite so good as it had done the first time.
Now that I knew I could go at any time, I was in no hurry to leave. Up above, guns in hand3 those men would be waiting and if there was one outstanding attribute that characterised their attitude to work on hand, it was a single-minded thoroughness. Where those lads were concerned, a job half done was no job at all. They could only have come there by boat and that boat would have been very nearby. By this time it would be even nearer by, it would be sitting directly over the spot where the helicopter had gone down and the crew wouldn’t be sitting around with drinks in their hands congratulating themselves on their success, they’d be lining the side with searchlights or flashes and waiting to see if anyone would break surface. With their guns in their hands.
If I ever got back to the Firecrest again, if I ever pot in touch with Uncle Arthur again, I wondered dully what I would say to him. Already I’d lost die Nantesville, already I’d been responsible for the deaths of Baker and Delmont, already I’d given away to the unknown enemy the secret of my identity – if that hadn’t been obvious after the fake customs officers had smashed our transmitter it was bitterly obvious now – and now I’d lost Lieutenant Scott Williams his life and the Navy a valuable helicopter. Of Uncle Arthur’s forty-eight hours only-twelve were left now, and nothing could be more certain than when Uncle Arthur had finished with me, I wouldn’t be allowed even those twelve hours. After Uncle Arthur had finished with me my days as an investigator would be finished, and finished for ever; with the kind of references he’d give me I wouldn’t even qualify as a store detective in a street barrow. Not that it would make any difference what Uncle Arthur thought now. Baker and Delmont and Williams were gone. There was a heavy debt that had to be paid and the matter was out of Uncle Arthur’s bands now. On the form to date, I thought bleakly, there wasn’t one bookmaker in the land who would have given odds of one in a thousand of that debt ever being repaid. Only a fool bets against a certainty.
1 wondered vaguely how long the men up top would wait -my conviction that they would be waiting was absolute. And then I felt a dry salty taste in my mouth that had nothing to do with the steadily deteriorating quality of air. It was pretty foul by this time, but a man can survive a surprisingly long time in foul air and there was enough oxygen left in that heavily tainted atmosphere to last me for a good few minutes yet.
The question was not how long they would wait but bow long I could wait. Or had I already waited too long? I could feel the panic in my throat like some solid lump in my windpipe completely obstructing my breathing and had to make a conscious physical effort to force it down.
I tried to recall all I could from my marine salvage days. How long had I been under water and how deep down was I? How long had that dive down from the surface of the sea to the bottom taken?
Under those conditions time loses all meaning. Say forty seconds. Just over half-way down I’d taken my last gulp of air before the water in the fuselage had flooded over my head. And then a minute, probably a minute and a half, fighting with that jammed door. Since then a minute to recover, half a minute to locate that open door, and then how long since? Six minutes, seven? Not less than seven. I couldn’t reckon on a total of less than ten minutes. The lump was back in my throat again.
How deep was I? That was the life-or-death question. I could tell from the pressure that I war pretty deep. But how deep? Ten fathoms? Fifteen? Twenty? I tried to recall the chart of Torbay Sound. There were eighty fathoms in the deepest channel and the channel was pretty close to the southern shore at this point, so that the water was steep-to. God above, I might even be in twenty-five fathoms. If I was, well that was it. Finish. How did the decompression tables go again? At thirty fathoms a man who has been under water for ten minutes requires to spend eighteen minutes for decompression stops on the way up. When you breathe air under pressure, the excess nitrogen is stored in the tissues: when you begin to surface this nitrogen is carried by the blood-stream to the lungs and is eliminated in respiration: and if you rise too rapidly respiration can’t cope with it and nitrogen bubbles form in the blood, causing the agonising and crippling diver’s bends. Even at twenty fathoms I’d require a six-minute hah for decompression on the way up and if there was one certain fact in life it was that decompression stops were out for me. I’d be a broken man. What I did know for certain was that every additional second I remained there would make the bends all the more agonising and crippling when they finally struck. All at once the prospect of surfacing beneath the steady guns and the pitiless eyes of the men above seemed positively attractive compared to the alternative, I took several deep breaths to get as much oxygen as possible into my blood-stream, exhaled to the fullest extent, took a long final breath to fill every last cubic millimetre in every last nook and cranny in my lungs, dived under the water, pushed my way out through the doorway and made for the surface.
I’d lost count of time on the way down and I now lost all count of time on the way up. I swam slowly and steadily using enough power to assist my progress through the water, but not so much as prematurely to use up all the stored oxygen. Every few seconds I let a little air escape from my mouth, not much, just enough to ease the pressure in my lungs. I looked up but the waters above me were as black as ink, there could have been fifty fathoms above my head for any trace of light I could see. And then suddenly, quite some time before the air supply was exhausted and before my lungs had begun to hurt again, the water was a shade less than pitch black and my head struck something hard and unyielding. I grabbed it, held on, surfaced, sucked in some lungfuls of that cold, salt, wonderful air and waited for the decompression pains to start, those sharply agonising twinges in the Joints of the limbs. But none came. I couldn’t have been more than fifteen fathoms down and even then I should have felt something. It had probably been something nearer ten.
During the past ten minutes my mind had taken as much a beating as any other part of me but it would have to have been in very much poorer shape than it was for me not to recognise what I was clinging to. A boat’s rudder, and if any confirmation had been required the milkily phosphorescent water being turned up by the two slowly turning screws a couple of feet ahead of me would have been all that was required. I’d surfaced right under their boat. I was lucky. I might have surfaced right under one of their propellers and had my head cut in half. Even now, if the man at the wheel suddenly decided to go astern I’d be sucked into the vortex of one or other of the screws and end up like something that had passed through a turnip-cutting machine. But I’d been through to much to cross any bridges before I came to them,