 CONT: When Cornelia and Lizzie go into Cornelias bedroom and  prepare to spend the night sleeping in the same room, Cornelia puts  the chair in front of the door. Soon after that, Lizzie mentions to  Cornelia that she has forgotten her nightclothes, among other  things, in her room and has to go get them. When she opens the door  to leave the room, the chair that Cornelia had put there is gone.