It was best to play possum and let nothing be heard of us – come what might. So I laid the boat on the bottom where it bedded itself softly in sand and mud. I ordered the crew to rest and as far as possible not to think of depth charges, though it was impossible not to hear them. I thought: whoever throws so many will soon have none left. Meanwhile the hands of our clock kept moving, the search dragged on and lasted into the night.