In 1984 something strange happened in the village of Dodleston. A BBC Micro was sitting on a counter, when it suddenly started receiving mysterious messages, which appeared to come from the 16th century. This might have gone unnoticed had local teachers, Ken Webster and Peter Trinder, not investigated to find that information was so accurate, it would be almost impossible to fake.
This whole event was documented in the book "The Vertical Plane", published in 1989.
It was most likely a hoax, but it will definitely haven taken a lot of research beforehand to pull this off.
It does make for a nice story, though.