In the second chapter ("Mystery in Character: A Secret Life with a Secret") of her delicious little book, The Art of Mystery: The Search for Questions, Maud Casey uses the work of Vivian Maier to illustrate the power of secret in fiction as well as life. Vivian Maier was a nanny with a camera, a woman who left more than 150,000 negatives, countless rolls of undeveloped film, scores of films, audiotapes, writings and hoards of bits and pieces of an entirely secret life, unknown by anyone before she died in poverty in 2009. Since the discovery and revelation of this trove, she is on the way to being recognized as not only a unique street photographer but among the greatest photographers of the twentieth century. The story of her discovery and the astonishing revelations of those who knew her as her friend and as their nanny is told in the film Finding Vivian Maier, by John Maloof. He bought much of her work by chance at auction and has subsequently acquired most of the rest of Maier's incredible output. It is a gripping account not only of her work but of the mad eccentricity of her secret life which as Maud Casey's subtitle suggests, raises far more compelling questions than answers—one of the great values of mystery.

Please see this film if you can. I do not know if it is available on the internet. I got my copy from the local library. It is unforgettable.