Miller turned to follow my gaze and froze. Coalescing in the shadow of the nearest support pillar was a tall figure in a blue surgical smock. As we both watched, the features became clear enough to recognise, though Miller must have guessed what was coming as soon as he saw the predominant colour of the clothing. He wheeled back to me, mouth open to say something, but instead his eyes fixed on something behind me and his face turned pale. I glanced over my shoulder to where the other figures were materialising, all with the same tall build and tanned complexion, all in blue surgical smocks. When I looked back again, Miller's expression seemed to have collapsed.