Roger Mellie
Midfield
I recall reading about those two young sisters who photographed a fairy at the bottom of the garden.
It fooled all of the experts of the day and it wasn't until the last one was on her deathbed that she finally confessed to having faked it.
The cottingly fairies
The main supporter was sir Arthur Conan Doyle who said the girls had really discovered fairies.
Was made to look quite the tit when it became apparent that they were cutouts on wire taken from a story book
Edit: now with obligatory wiki link https://en.m.wikipedia.org/wiki/Cottingley_Fairies