Claire O'Neill explains the bizarre photo-bombing spirit in the picture above:
In the early 1900s, there was a photographer in England who claimed he could communicate with the dead — and he could prove it: Spirits would actually appear in front of the camera for William Hope. So if you lost a loved one in World War I, for example, you could get a portrait made by Hope, and your loved one just might make a ghostly appearance.
Today, of course, we readily recognize the tricks of double exposure. Hope would superimpose old photos of the deceased in his portraits — and he made a killing doing it, if you'll pardon the pun.
Hope's process was eventually revealed, but supporters, like Sir Arthur Conan Doyle, rallied to defend him. Check out the full set. The caption for the above:
The face of a young woman appears over the woman on the right of the photograph. The reverse of the photograph reads: 'Why is the child always pushing to the front?' and 'Do we get messages from the higher spirits?'; perhaps questions the women wanted answering.