nvestigating this case, Australian paranormal researcher Tony Healy visited the cemetery in the late 1990s. Near Joyce's grave he found the graves of two infant girls.
The possible explanations are (in decreasing order of magnitude):
1. Deliberate Fake
2. Accidental Fake
3. Paranormal
We know that there are millions of provably deliberate and accidental fake photos. We know of no provably paranormal photos.
So by far the most likely explanation is a fake. It's unlikely that you could ever find out now if it was deliberate or accidental, with the people involved long dead, but there's not pressing need to prove it.
However, given the lack of double exposure elsewhere in the photo, and accidental double would need the child photographed on a large dark background by someone other than Mr Andrews. So I lean towards deliberate fake.
Additional evidence for "deliberate" is what looks like part of an arm, which does not really seem to fit either photo, and it's hard to see how it could be accidental.
I suspect many young people are unfamiliar with just how common double exposures were back in early film days. They grew up with highly reliable film cameras, or increasingly entirely digital cameras.
A double exposure is simply taking two photos with the same piece of film. Normally you'd wind the film on after each photo, and the cameras were designed to require this before pressing the shutter button. But it was possible to bypass it manually on many cameras, and it can happen accidentally if the film slips - more common in older cameras.
Fake photos using double exposures have been around since the 1860s
Kanacki