anchor: But after the cheese and biscuits had been handed round, and Dorcas had left the room, Poirot suddenly leant forward to Mrs. Cavendish. 
positive: Following the distribution of the cheese and biscuits, Poirot leant towards Mrs.Cavendish.
negative: After the serving of the biscuits and cheese, Poirot stepped further away from Mrs.Cavendish.