The technological breakthroughs of the 19th century were, to many people, both equal parts exciting and terrifying. Known as the black arts, the newly emerging techniques of commercial photography were often spoken about as though they were a mysterious or even supernatural process. Of course, there was nothing supernatural about the new technology, at least, not for most photographers. When William Mumler picked it up as a hobby, lured in by his attraction to a local studio owner and a propensity to tinker, he decided to lean into the mystery by offering a spyhole into the unseen world of the dead, shooting portraits of clients sitting alongside the spirits of their lost loved ones.
