For example, dead people. You can't do much in this mystery market if you don't have a corpse or 12 hanging around some city, mansion, distant planet, etc.
Especially when the dead talk back. They've been sitting in the room of their demise for many years and just would like to be acknowledged. And there are people on THIS side who want to help. Folks like the Albany Paranormal Research Society who are searching for, and perhaps finding, people who have moved on from this plane of existence to oh, your closet, say.
These good ladies do not have a TV show or a cable station to fall back on. They are not part of the Scooby gang, and they have not yet found out that the town lawyer is dressing up as a poltergeist to frighten people from a house so he can...whatever...
Nope. These folks, all volunteer, just ask questions. People call them, thinking perhaps the Ghostbusters car will pull up in front of their home and Bill Murray and company will jump out, and vacuum up ectoplasm, and your troubles with it. Sometimes your "haunt" is a TV set, or too many electric things running. Sometimes the ghost will fold your laundry. Frankly, I think that ghost should be left alone, and if he has time, I'd like him to mow my lawn.
But one spirit these intrepid ghost hunters have contacted has a name that history knows well. General Ulysses S. Grant.
In a house in Saratoga up my way, the hunters conversed with the good General and President. Grant and family visited the area many times before settling in Mt. McGregor at (what is now) exit 16 of the Northway. The General was dying, and he was racing time to complete his memoirs and secure his family's financial future after being swindled by the Bernie Madoff's of his age. He moved from New York City to the small cottage on Mt. McGregor in the summer of 1885. But Grant had been in the area before, and he stayed here: