Sometimes gruesome stories emerge, such as the discovery that a house in Connaught Square I researched was most probably on the exact site of the infamous gallows at Tyburn.  This fact was particularly mentioned in the original lease granted by the Bishop of London.  One other grisly detail: it's likely that various parts of Oliver Cromwell are buried beneath the house.  When his body was disinterred from the tomb of kings in Westminster Abbey in 1660, he was then posthumously hung from the gallows at Tyburn and his body buried there.  His head, however, went on a tour of England, before being buried - finally - in Sidney Sussex College, Cambridge.  It's debatable whether some people would want to know all this, but luckily it didn't worry the owner of the Connaught Square property in the slightest.