Joe Cooper, who has died aged 87, was the jovial debunker of the celebrated Cottingley fairy photographs (supposedly showing fairies captured on film in a Yorkshire garden in 1917). He remained a firm believer in unexplained phenomena to the end. In spite of finally prompting a confession of fakery by one of the two cousins who took the pictures, Cooper was far from sceptical about the existence of "little people" and thought that something genuinely unusual had happened in the West Riding village.
His engaging and sympathetic approach ended the long deception by the cousins, Frances Griffiths and Elsie Wright, who were in their 80s when Cooper's interview appeared in the magazine The Unexplained in 1983. They described to him how the "fairies" had been copied by Wright from a well-known children's book of the time, The Queen's Gift Book, and then held in place with hatpins.
Such trickery was widely assumed to have taken place by the time the interview appeared, in spite of the early endorsement of the images by photographic specialists and eminent figures, notably the writer Sir Arthur Conan Doyle. In a television discussion after Cooper's story had been published, Griffiths explained how she and Wright had seen a childish joke get wildly out of hand, because of people who "believed because they wanted to believe".
In a sense, this was true of Cooper, who combined an academic career with less conventional enthusiasms to which he devoted great zest. He promoted astrology and psychic investigation winningly, believing in Conan Doyle's summary of the fairies: "The recognition of their existence will jolt the material 20th-century mind out of its heavy ruts in the mud, and will make it admit that there is a glamour and mystery to life."
