can anyone tell me who is the murderer in The Big Four? I found this story extremely confusing when reading it and although I have also seem the filmed version with David Suchet, it bears little resemblance to the actual story. Also, if anyone can enlighten me as to who was the murderer/murderess of the original crime in Postern of Fate (not the later crime investigated by T&T) I would be grateful to learn that also. Please mark the start of your reply 'Spoiler Alert' so not to spoil it for others who have not read the stories. Thank you.