Poirot might choose to sit in a chair, put the tips of his fingers together, and set his grey cells whirring to work while his body reclined comfortably within four walls. That was not the procedure that appealed to Ariadne Oliver. She had said, very forcibly, that she at least was going to do something. She was going to find out more about this mysterious girl. Where was Norma Restarick? What was she doing? What more could she, Ariadne Oliver, find out about her?