"Fancy that!" he said. "Fancy a couple of doctors inventing a disease. It does sound a shame, don't it?" "Wait till you get it," said Sarakoff. "It seems to me you've been and done something nasty," he went on. "Ain't there enough diseases without you two going and makin' a new one? It's a fair sickener to think of all the diseases there are--measles and softenin' of the brain, and 'eaving stummicks and what not. What made you do it? That's what I want to know." He was getting angry. He pointed the stem of his pipe at us accusingly. His small eyes shone. "It's fair sickening," he muttered. "I've never took to doctors, nor parsons--never in my life." He spat expressively. "And my wife, too, clean barmy," he continued. "Who 'ave I got to thank for that? You two gents. Doctors, you call yourselves. I arsk you, what is doctors? They never does me any good. I never seed anyone they'd done any good. And yet they keeps on and no one says nothing. It's fair sickening." There was a sound of footsteps behind me. I turned and saw a policeman climbing slowly up the bank towards the road. Like all policemen he appeared not to notice us until he was abreast of our seat. Then he stopped and eyed each of us in turn. His boots were muddy. "These gents," said the taxi-man, "'ave been and done something nasty." The phrase seemed attractive to him and he repeated it. The policeman, a tall muscular man, surveyed us in silence. Sarakoff, his hair and beard dishevelled, was leaning back in a corner of the seat, with his legs crossed. His dressing-gown was tucked closely round him, and below it, his pink pyjamas fluttered in the thin breeze. His expression was calm. The taxi-man continued-- "I picked these gents up in the Euston Road. They was in a hurry. I thought they'd done something ordinary, same as what you or me might do, but it seems I was wrong. They've been and done something nasty. They've gone and invented this 'ere Blue Disease." The policeman raised his helmet a little and the taxi-man uttered an exclamation. "Why, you've got it yourself," he said, and stared. The policeman's eyes were stained a vivid blue. "An immortal policeman!" murmured Sarakoff dreamily. The discovery seemed to discomfit the taxi-man. The tide of indignation in him was deflected, and he shifted his feet. The policeman, with a deliberation that was magnificent advanced to the seat and sat down beside me. "Good-morning," I said. "Good-morning," he replied in a deep calm voice. He removed his helmet from his head and allowed the wind to stir his hair. The taxi-man moved a step nearer us.