Mysterious strangers, usually but not always dressed in black, who appear and disappear at significant moments in history. In the twentieth century they were mostly observed in association with UFO sitings and the silencing of witnesses to UFOs.
The Periodic Table of Paranormal Elements
Mysterious strangers, usually but not always dressed in black, who appear and disappear at significant moments in history. In the twentieth century they were mostly observed in association with UFO sitings and the silencing of witnesses to UFOs.