... I was feeling ill. I said that I was fine, just thinking about a difficult work problem. That evening I left the office at six o’clock. I walked quickly to the street where I had first seen ... and left. Out in the street, we looked at each other. I was starting to think I must be imagining everything. 'Perhaps it was a visitor,' said Andrea, realising how bad I felt. 'Or ... feeling afraid in the dark. And if I went back to sleep, I had the dream again. And if I didn't go back to sleep, I lay in bed in the dark trying to understand what was 35pleased to...