Malvern, Pennsylvania (CNN) -- "This is a mass grave," Bill Watson said as he led the way through the thick Pennsylvania woods in a suburb about 30 miles from Philadelphia.
"Duffy's Cut," as it's now called, is a short walk from a suburban cul-de-sac in Malvern, an affluent town off the fabled Main Line. Twin brothers Bill and Frank Watson believe 57 Irish immigrants met violent deaths there after a cholera epidemic struck in 1832. They suspect foul play.
"This is a murder mystery from 178 years ago, and it's finally coming to the light of day," Frank Watson said.
The brothers first heard about Duffy's Cut from their grandfather, a railroad worker, who told the ghost story to his family every Thanksgiving. According to local legend, memorialized in a file kept by the Pennsylvania Railroad, a man walking home from a tavern reported seeing blue and green ghosts dancing in the mist on a warm September night in 1909.
http://www.cnn.com/2010/CRIME/08/24/pennsylvania.graves.mystery/index.html?iref=obnetworkCher