Curtis gripped my arm. On the other side of the building a rectangle of pale moonlight showed the doorway that he had remembered. For a moment it was blocked by shadows. Then it was clear again. Something fell with a crash of iron and there was a muttered curse in Norwegian. Then a torch was shone on the floor. 'You take Lovaas,' I told Curtis. 'Dick. You get the other fellow. I'll look after Sunde.'

We dosed on them from behind. It would have been easy if Dick hadn't stumbled against something. There was a clatter. Then the torch swung on to us. I saw Curtis go forward in a diving tackle. The torch spun across the floor. There was a thud of bone on bone as Dick hit out. And then everything was a wild jumble of curses and blows. 'Sunde,' I called. 'Quick. The yacht is down in the cutting.' He must have heard me, for I saw his small figure dive for the doorway. Curtis and Dick called to each other. Then we were all through the door and running for all we were worth across the open rock. Sunde was ahead of us, clearly visible in the moonlight. His boots slithered on the smooth rock. We quickly overhauled him.

Behind us came a shout. I glanced over my shoulder. The corrugated iron of the factory was quite white in the moonlight. Lovaas was following us. A stab of orange flame was followed by the whine of a bullet. He was firing as he ran.

We topped a rise and saw Diviner's masts. I shouted for them to get the engine started. My breath was coming in great sobs. I was badly out of training. The engine burst into life as we scrambled down the rocks into the cutting. Jill waved to us from the cockpit. Wilson was holding the boat against the outgoing tide on the after warp. 'Let go,' I told him as we reached the deck. Instantly the tide dragged her clear of the rocks.

Jill caught my arm. 'Thank God you're all right, Bill,' she said. 'Was there shooting?'

'Yes. Lovaas.' I called to Carter for full speed and took the wheel. Sunde looked all in. His face was pale. 'Get him below,' I told Curtis. 'And have Jill see to that hand of his.' Sunde had a nasty cut across the knuckles. 'You all right, Dick?'

'Fine,' he replied.

I looked back. Two lines of ripples stretched diagonally across the inlet, marking our progress. A figure appeared on the rock under which we had moored. It was Lovaas. He stood watching us for a moment, quite still and silent. Then he turned and went back towards the factory.

'Take over, will you, Dick,' I said. 'I want to have a talk with Sunde.'

'Where shall I head for, skipper?'