A gallery that should comfort any struggling young graphic artist is revealed for the first time today: the ones that got away, rejected original versions of posters for some of the most famous films of recent decades, including Batman, Pulp Fiction, A Clockwork Orange, The Exorcist and Cool Hand Luke.

The last three were the work of the remarkable Bill Gold, who over a 70-year career created the images that sold more than 1,000 movies.

As a 21-year-old in the art department of Warner Bros, he was asked to come up with a poster for a vehicle for one of its stars, Humphrey Bogart.

The strange case of the parole officer, the painting and the LSD is a bizarre perspective on the value of art.

A former parole officer claims that when celebrated painter Peter Doig was a teenager spending some time in a Canadian correctional facility for possession of LSD, he did a landscape and sold it to the claimant for $100. Doig says he was never in a correctional facility (though he happily admits to taking LSD), never visited this part of Canada and has never met the man, let alone sold him a painting.