"The naked man who lay splayed out on his face beside the swimming pool might have been dead. He might have been drowned and fished out of the pool and laid out on the grass to dry while the police or the next-of-kin were summoned. Even the little pile of objects in the grass beside his head might have been his personal effects, meticulously assembled in full view so that no one should think that something had been stolen by his rescuers."