The death of William Henry Harrison had significant consequences, including the collapse of a major political party. And the story of how he died that most of us learned in school is almost certainly false. In fact, he might well have been the victim of a serial killer of presidents- the water in Washington DC.
In Time for Halloween. A 3500 year old Babylonian tablet gives the first known description of how to get rid of a ghost. It involves two dolls and beer.