In the early 1970s, two young filmmaking brothers unloaded their camera and recording equipment on the collapsing front porch of a dilapidated manor in East Hampton. The seemingly abandoned, decaying shell of a once-glorious home belonged to Edith Bouvier Beale. She and her daughter Edie Beale were the aunt and first cousin of former First Lady, Jacqueline Kennedy Onassis.Lois Erdmann Wright was one of only a handful of outsiders allowed into Grey...