Chapter 19 Summary

Hastings visits Georges, which was Poirot's valet for many years, prior to Curtiss. Poirot told Hastings Georges left to take care of his father but Georges says this isn't the case. Hastings realizes that Curtiss is X.

Chapter 19 Analysis

It seems as if Poirot knew he was dying. This is why he returned to her first true home, Styles. This is also why he replaced Georges with Curtiss. Poirot knew that Curtiss was the one that was capable of murder because he was once in an insane asylum and then returned to work at it when he became a nurse.