On September 28, 1983, the discovery of a previously unknown tale by Wilhelm Grimm was reported on the front page of The New York Times . "After more than 150 years," the Times noted, "Hansel and Gretel, Snow-White, Rumpelstiltskin, and Cinderella will be joined by another Grimm fairy-tale character." The story of dear Mili was preserved in a letter Wilhelm Grimm wrote to a little girl in 1816, a letter that remained in her family's possession for...