Here's an interesting little story which appeared on the day of the MJK inquest.
Evening News, 12th November 1888
REPORTED LETTER FROM THE MURDERER
"It is reported this morning, from Spitalfields, that Mrs. McCarthy, the wife of the landlord of No. 26 Dorset street, this morning received by post a letter signed Jack the Ripper, saying that they were not to worry themselves, because he meant to 'do' two more in the neighbourhood, a mother and daughter. The letter was taken immediately to Commercial Street Police station and handed to the Inspector on duty.
"The Press Association, on inquiring at Commercial street Police station, subsequently was assured that no such letter had been received there."
I am just a tiny bit surprised to see you taking this kind of claim seriously.Macnaghten said that when he took office the mail bin at Scotland Yard, which was large-was always full to the brim with fresh "letters from the ripper" from every type of person imaginable.So if all the McCarthy"s got was one letter they were very lucky!
No I hadnt seen page 116 in," The Letters from Hell" book, but I have now had a look at it and read the rest of the text.It seems to me to be yet another prankster.But sound off Simon----your argument might persuade a closer look and new revelations!