Summary

After Hildegard Schmidt leaves, Poirot, M. Bouc and Dr. Constantine go over the evidence they've gathered, and the questions that arise from that evidence. They consider the time of the crime, which Schmidt's evidence suggests occurred at the time Ratchett's watch stopped. However, Poirot comments that the watch could have been deliberately faked to cover up the fact that the murder was actually committed earlier or later. They also consider the mysterious conductor, who couldn't have been any of the men on the train (who are all of large build), who could be one of the women, who may either still be on the train or who may have escaped, and whose uniform may have been the source of the missing button found by Mrs. Hubbard. They then consider the identity of the woman in the silk kimono, and Poirot proposes that the mysterious...