John Snare and the lost Velázquez
In 1845 John Snare, a bookseller in Reading, paid a few pounds at a country-house sale for a grimy portrait he became convinced was Velázquez's lost 1623 portrait of Prince Charles, painted during Charles's visit to Madrid to court a Spanish princess. Snare published a pamphlet, exhibited the picture, and was sued in Edinburgh by parties who claimed the painting as theirs. He won in court but was ruined by the litigation and his obsession, abandoned his family and business, and moved to New York, where the painting disappeared from the record after his death.