An eerie image of a figure in period costume at a Scottish castle has spooked experts conducting the biggest ever investigation into photographic evidence for ghosts.
The picture, taken in May 2008, appears to show a man or woman in a ruff peering out of a barred window at Tantallon Castle.
No mannequins or costumed guides are employed at the castle, and three photographic experts have confirmed that no digital trickery was used on the photo.
Even confirmed ghost sceptic Professor Ri...