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 ? "
The mistress in question is the head of the vampire clan and she has a green dress .