Directors: John Maloof, Charlie Siskel
Running time: 83 mins
Rating: PG
Verdict: Deft filmmaking and engrossing subject.
In 2007, while compiling a history of a Chicago neighbourhood, John Maloof bought at auction a box of locally shot photographic negatives.
He typed the name of the photographer, Vivian Maier, into Google and did not get a single result.
That the name now returns more than 10 million hits is surely thanks to Maloof, who worked tirelessly to sort through the detritus of an unnoticed life - not least 150,000 photographs - and bring a remarkable artist to the attention of the world.
The film that he and Charlie Siskel have made does not dwell on the tragic irony that the two years that elapsed between the auction and the first time he published one of the images online were Maier's last; he never met her, though the impression the film leaves us with is that she would have wanted nothing to do with him. But what he discovered and presents here is a photographer with a distinctive and original visual sense, located somewhere between Cartier-Bresson and Diane Arbus.