An 1871 spirit photograph by William H. Mumler featuring Charles H. Foster and the spirit of Adah Isaacs Menken.
Adah Isaacs Menken (1835 – 1868) – American actress, painter and poet, and was the highest earning actress of her time. She was best known for her performance in the hippodrama Mazeppa, with a climax that featured her apparently nude and riding a horse on stage.