text: Then , if there had been a large patch of candle grease on the floor , you think you would have been sure to have seen it ? 46 " Yes , sir , and I would have taken it out with a piece of blotting-paper and a hot iron . " Then Poirot repeated the question he had put to Dorcas : " Did your mistress ever have a green dress ? "
  
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  Poirot really wants to know if Dorcas 's mistress has a green dress .