The Cottingley fairies was a story caused by 9 year old Frances Griffiths, and 16 year old Elsie Wright who fabricated images of fairies, claiming them to be real.
Elsie had copied the drawings from a book she had at home, and used her artwork outside to create the fairies in the images.
I do quite like the idea of mixing drawings and photography, as I feel the combination tends to create an almost surreal feeling. I think this type of artwork does well when created in dark room, as you can add even more layers to the image very easily.
