In 1994, Mark started the first ghost walk in Gettysburg, The Ghosts of Gettysburg Candlelight Walking Tours®. Armed with tales from his ghost books - and with a few that aren't in the books -guides dressed in period attire take visitors on evening tours through sections of town that were bloody battlefields 13 decades ago; through night-darkened streets to houses and buildings where it's not as quiet as it should be; to sites on the old Pennsylvania College campus where the slain once lay in rows, and the wounded suffered horribly, waiting to become corpses themselves; to cemeteries where the dead lie. . . sometimes not so peacefully. Gettysburg may very well be, acre for acre, the most haunted place in America.