Adamski claimed Orthon had refused to allow himself to be photographed, and instead, had asked Adamski to provide him with a blank photographic plate, which Adamski claimed he had given Orthon. George Hunt Williamson (a contactee and Adamski associate) also claimed that after Orthon left, he was able to take plaster casts of Orthon's shoe imprints. The imprints contained mysterious symbols, which Adamski said was a message from Orthon. Orthon is said to have returned the photographic plate to Adamski on 13 December 1952; when developed it was found to contain strange new symbols. It was during this meeting that Adamski is said to have taken a now famous photograph of Orthon's Venusian scout ship using his telescope. At the time, skeptics said it looked suspiciously like the top of a "chicken brooder", for warming newly hatched poultry. Anglo-Irish eccentric Desmond Leslie struck up a correspondence with Adamski. In the mid-1950s Leslie had created a low-budget UFO film entitled Them In The Thing at his home, Castle Leslie. The flying saucer in the film had been created by shining mirrors on to a Spanish Renaissance shield suspended from a fishing line. The film was rediscovered in 2010. In need of money and keen to create a bestseller, Leslie had written a manuscript about the visitation of Earth by aliens. Its genesis had been Leslie chancing upon a copy of the 1896 book The Story of Atlantis and the Lost Lemuria by William Scott-Elliot in a friend's library. Adamski sent Leslie a written account of his supposed contact with Orthon, and photos. Leslie combined the two works into the 1953 co-authored book Flying Saucers Have Landed. The book became a bestseller, brought both Adamski and Leslie news media attention, and eventually became "a key text of the New Age movement." The following year, Leslie visited Adamski in California and claimed to witness several UFOs with him. Leslie described one of them in a letter he sent to his wife while he was in San Diego: Flying Saucers Have Landed claimed Nordic aliens from Venus and other planets in Earth's solar system routinely visited the Earth. According to the book, Orthon and other aliens were worried that nuclear bomb tests in the Earth's atmosphere would kill all life on Earth, spread radiation into space, and contaminate other planets. Adamski claimed that Nordic aliens worshiped a "Creator of All", but that "we on