article_snippet: From the gallstones of an Acid Bath Murderer victim to execution ropes used in the 19th century, these exhibits are among the most unusual and macabre you could find in Britain.
article_snippet: Execution ropes used in the 19th and 20th century (left), and the gun used by Ruth Elllis, the last woman executed in Britain, will be on show .
article_snippet: The death mask of Robert Marley (left)), who was executed in 1856 for beating a jeweller to death in London, will go on display later this year .
article_snippet: There will be various items relating to the 1949 killing of 69-year-old wealthy widow
highlights_snippet: Exhibits include death masks of hanged criminals and bomb shrapnel .
  