the boy who climbed the rope was observed by the audience to have swung to the end of another rope behind a curtain. A man named "Karachi" (real name Arthur Claude Darby), a British performer based in Plymouth, endeavoured to perform the trick with his son "Kyder" on 7 January 1935 on a field in Wheathampstead, Hertfordshire. After being granted four days to prepare the site, the presentation was filmed by Gaumont British Films. His son could climb the rope but did not disappear, and Karachi was not paid. The Occult Committee demanded the trick must include the disappearance of the boy. In 1935, Karachi sent a challenge to the skeptics, for 200 guineas to be deposited with a neutral party who would decide if the rope trick was performed satisfactorily. His terms were that the rope shall rise up through his hands while in a sitting posture, to a height of , his son Kyder would then climb the rope and remain at the top for a minimum of 30 seconds and be photographed. The rope would be an ordinary rope supplied by a well-known manufacturer and would be examined. The place could be any open area chosen by the neutral party and agreed to by the conjurers, and the spectators could be anywhere in front of the carpet on which Karachi would be seated. The conjurers of the Occult Committee refused to accept Karachi's terms. In 1936, Jasper Maskelyne stated that he had "perfected half of an Indian rope-trick"; he could make the rope rise into the air in an open space and have a boy climb it but could not make the boy disappear. Maskelyne never demonstrated his method but offered £2,000 to anyone who could perform the full trick in open space. Nobody ever claimed this reward and he considered the full trick to be a myth, never successfully demonstrated. In 1950, John Booth offered a reward of 25,000 rupees to any conjuror in India who could successfully demonstrate the trick. Many other rewards have been offered but all went unclaimed. Examination of eyewitness accounts In 1996, Nature published Unraveling the Indian Rope Trick, by Richard Wiseman and Peter Lamont. Wiseman found at least 50 eyewitness accounts of the trick performed during the late 19th/early 20th centuries, and variations included: The magician's assistant climbs the rope and the magic ends. The assistant climbs the rope, vanishes,