Highland Park, Illinois, 1950s. A tall, serious-looking woman walked down the street with three boys. She appeared to be just another typical middle-class neighborhood nanny. Her pixie-like haircut, and her collared blouse tucked tightly into her calf-length skirt, all covered up in an oversized men’s coat; nothing special about the woman would have caught your attention – except for the Rolleiflex camera slung around her neck. While keeping the children in check, the nanny observed her surroundings and seemed to be taking photos. When she returned home, she cautiously locked the door of her attic bedroom behind her, took out the film from her camera, and placed it in a box alongside shoulder-high stacks of hoarded newspapers, mail, and receipts.