The mirror is in Myrtles Bed and Breakfast Plantation, which is claimed to be one of the most haunted homes in America. The plantation was built in 1796, on an apparent native burial ground (is that where that cliche comes from?) and has been the scene for at least ten murders.
The mirror in question was added in the 1980's and guests have reported seeing figures of Sara Woodruff and her children in the mirror. There have also been children's handprints on the glass (kids touch mirrors, it's kind of what they do). Sara Woodruff and her children were poisoned and after their death custom was ignored and the mirrors were not covered during the funeral thus the souls of the dearly departed were trapped inside the mirror.