 Lincoln conspirator Mary Surratt's boarding house (604 H Street NW) has been substantially renovated through the years (and currently houses a Chinese restaurant), but it is also said to house Mary Surratt's ghost.From the 1870s onward, occupants of the building have claimed that Surratt's spirit is responsible for the incomprehensible mumbling and whispers, footsteps, muffled sobs, and creaking floorboards which have unnerved them.At least three other sites in downtown D.C. are also reputed to be haunted.