Barki, who has rediscovered many of the country's lost paintings, believes the painting is likely to have been sold in 1928 in Hungary "because that was when it was last exhibited and, as most of the buyers were Jewish, it probably left the country as a result of the war".
The health secretary, Jeremy Hunt, who has been criticised by some senior doctors for painting an unfairly negative picture of NHS staff and the quality of care provided, welcomed the report.
His painting includes references to Arabic calligraphy as well as western graffiti styles.
I was thinking: how will this painting be taken?
I incorporated this surveillance camera in the painting.
"It is powerful because it is not just a film about someone getting their painting back; it is a means of unlocking everything that happened to those families".
Another painting he created at this time, The Fortune Teller, shows a young woman deftly removing a man's ring as she pretends to read his palm.
This powerfully realistic wall painting takes us aback.
The exhibition catalogue and captions will say it is "by Leonardo da Vinci" – which is about the most spectacular claim you can make for any old painting.
Russell Drysdale's painting, The Cricketers comes to mind, for its stone pub and veranda profile.
Back in Georgetown, waiting for a taxi to the airport, we do a last-minute dash around the street stalls: all I salvage are an oil painting of the Kaieteur Falls (a rather Surrealist interpretation), a shell necklace, a woven basket and as much El Dorado rum as possible, before the plane carries us to a connecting flight at Barbados, and the waters change from brown to a shock of bright blue.
