I stared at him, puzzled. Without a word he walked into his bedroom and returned with a bottle in his hand which he handed to me. I took it, for the moment uncomprehending. It bore the words: Revivit.—To bring back the natural tone of the hair. Revivit is not a dye. In five shades, Ash, Chestnut, Titian, Brown, Black. “Poirot,” I cried. “You have dyed your hair!” “Ah, the comprehension comes to you!” “So that’s why your hair looks so much blacker than it did last time I was back.” “Exactly.” “Dear me,” I said, recovering from the shock. “I suppose next time I come home I shall find you wearing
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