Even after his eyes were open he took in his surroundings only gradually. He had the impression of swimming up into this room from some quite different world, a sort of underwater world far beneath it. How long he had been down there he did not know. Since the moment when they arrested him he had not seen darkness or daylight. Besides, his memories were not continuous. There had been times when consciousness, even the sort of consciousness that one has in sleep, had stopped dead and started again after a blank interval. But whether the intervals were of days or weeks or only seconds, there was no way of knowing.