Paula struggled to her feet and came over.
‘He couldn’t have carried all this stuff down that outside tunnel,’ I said excitedly. ‘Hunt around. There must be another way out of here.’
The walls were solid enough, so I turned my attention to the floor. It was Paula who found the cunningly concealed trap-door. By treading on one end, the other lifted sufficiently to get a purchase on it.
Together we lifted the trap. A blast of fresh air came surging into the cave.
‘This is it,’ I said, and flashed the torch into the darkness, below. Rough stone steps led down into a passage. I went first. As we reached the bottom step, we could see sunlight coming into the far end of the tunnel.
We went forward down the passage until we reached the opening. The strong sunlight blinded us for a moment. Below us was a wilderness of scrub bushes and sand. We seemed to have come out on the side of a deep quarry. A zigzag path led from the opening of the tunnel down into the quarry.
I was standing in the sunlight, with Paula behind me, when I heard a distant shout
It was only then that I saw, far below me, two big trucks, half hidden in the scrub and half a dozen or so men staring up at me, and pointing. As I stepped hastily back into the darkness, they began to run towards us.