A 17th-century Wiltshire parson swore a ghost leapt up behind him on a late-night ride home, and John Aubrey, a Royal Society fellow, wrote it up as evidence. His own verdict was blunt: where one apparition report is true, a hundred are figments, and the parson's horse was the best witness he had.

— via The Conversation — History, Louise Ryland-Epton, Visiting Fellow in History, The Open University