The ghost claimed that he was a salesman who’d been killed by the house’s former owner, and when human bones were discovered in the basement, the sisters’ story spread across the country. They began traveling from town to town holding séances, where they communicated with other spirits using the same method. As their fame as mediums grew, many others found that they could also contact spirits, and a new religious movement was born. Instead of church, members attended séances, where mediums helped them talk to dead relatives and receive guidance from the spirit world.
When ghosts at séances went from rapping on tables to moving objects and even appearing before audiences, many began to suspect that the mediums were just performing tricks. Clubs and societies were formed to investigate the existence of ghosts, and while a number of mediums turned out to be frauds, some investigators—including doctor and author Arthur Conan Doyle and scientist Pierre Curie—actually became believers. This tradition continues today on popular shows like Ghost Hunter and Ghost Adventures. Although no solid proof has been found yet, it’s hard to prove that ghosts don’t exist.