text: Mrs. Vandemeyer laid down the revolver on the edge of the washstand within reach of her hand , and , still eyeing Tuppence like a lynx in case the girl should attempt to move , she took a little stoppered bottle from its place on the marble and poured some of its contents into a glass which she filled up with water .
  
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  The glass of water that Mrs. Vandemeyer drank was only half full .