This photo was taken in 1891 inside the library at Combermere Abbey in Cheshire, England.

This photo was taken in 1891 inside the library at Combermere Abbey in Cheshire, England. At first glance, the room looks empty. But if you look closely at the chair on the left, you can see the faint outline of a man sitting there, with his head, collar, and one arm resting on the armrest.

Many believe this figure is Lord Combermere, a British cavalry commander who had lived at the Abbey. The strange part is that at the exact time this photo was taken, his funeral was happening nearly four miles away. He had been killed days earlier after being struck by a horse drawn carriage.

The photographer, Sybell Corbet, said the exposure time for the photo was nearly an hour, meaning anything that stayed still long enough could appear in the image. Skeptics later suggested that a servant might have briefly sat in the chair during the exposure. But members of the household insisted that everyone was away attending the funeral when the photo was taken.

So if no one was in the Abbey, and the man in the chair looks just like the person who had just died, it leaves one unsettling question.

Who, exactly, was sitting in that chair?