Hercule Poirot Frowned. "Miss Lemon," he said. "Yes, Mr. Poirot?" "There are three mistakes in this letter." His voice held incredulity. For Miss Lemon, that hideous and efficient woman, never made mistakes. She was never ill, never tired, never upset, never inaccurate. For all practical purposes, that is to say, she was not a woman at all. She was a machine-the perfect secretary. She knew everything, she coped with everything. She ran Hercule Poirot's life for him, so that it, too, functioned like a machine. Order and method had been Hercule Poirot's watchwords from many years ago. With George, his perfect manservant, and Miss Lemon, his perfect secretary, order and method ruled supreme in his life. Now that crumpers were baked square as well as round, he had nothing about which to complain…