[Photo source: Google search.]
There are probably thousands of purported ‘ghost’ photographs available on the internet. Most of these images have been found to be faked. A classic example of an obvious double-exposure is the photo of a seated Mary Todd Lincoln. Standing behind her with his hand on her shoulder is her dead husband, Abraham. [Look this up on the internet.]
But, for my money, one the most well-regarded ghost photo is that of The Brown Lady.
The picture was taken by a Captain Provand and Indre Shira while on assignment to photograph Raynham Hall in Norfolk, England for Country Life magazine. It was published in 1936. It was reported that she was seen by King George IV in the early 1800s while visiting Raynham Hall. He said she was wearing a brown satin dress.
By all accounts it is the spirit of Lady Dorothy Townshend. How she came to be dead is a matter of much debate, mostly salacious.
I will leave any backstory in your hands. Google away!
I don’t admit to believing in ghosts, but I’m never one to let the facts get in the way of a good story (or in this case, photograph.