Book excerpt: The stories, folklore, and history surrounding Maryland's most haunted places. A must-read for fans of the supernatural and Maryland history. The demon car of Seven Hills Road, the ominous Hell House above the Patapsco River, the mythical Snallygaster of western Maryland--these are the extraordinary tales and bizarre creatures that color Maryland's folklore. The Blue Dog of Port Tobacco faithfully guards his master's gold even in death, and in Cambridge, the headless ghost of Big Liz watches over the treasure of Greenbriar Swamp. The woods of Prince George's County are home to stories of the menacing Goatman, while on stormy nights at the nearby University of Maryland, the strains of a ghostly piano float from Marie Mount Hall. From the storied heroics of the First Maryland Regiment in the Revolutionary War to the mystery of the Poe Toaster, folklorists Trevor J. Blank and David J. Puglia unravel the legends of Maryland.