Maggie and Katie Fox spent their Victorian childhood in a supposedly haunted house in Hydesville, New York. To entertain themselves, the girls devised a method of contacting the noisy spirit. (In fact, they rigged up apples on strings to fake the bumping sounds.) As word of their unusual talents spread, the girls became famous, touring the country to hold seances with the likes of Horace Greeley and Mrs. Abraham Lincoln.Helen West, a journalist trying...