Like so many places in Chicago, you’d never know anything had ever happened at the unassuming vaduct. But the ghosts still tell the tale of labor’s deadly day.

For nearly a century, drivers on Chicago’s famed Archer Avenue have reported wee hour encounters with the city’s delusive vanishing hitchhiker, the “deathly dancer” called Resurrection Mary. Ursula Bielski shares her forty years of research into the city’s most famous ghost.