Le Prince disappeared in 1890 when he was visiting in France prior to returning to the United States, some investigators have asserted, to show a perfected model of his projector-camera. The mystery of his disappearance has never been solved. John Arthur Roebuck Rudge, an optician and instrument maker of Bath, England, had developed about 1866 the Bio-Phantoscope, an application of the Plateau magic-disk. He maintained a continuing interest in photography. About 1882 William Friese Greene (1855–1921), a young man who was a friend of the English photographer Talbot, came into contact with Rudge. In 1885 Greene opened a camera shop in London. A few years later he demonstrated before the Photographic Society a little projection instrument made by Rudge which showed four pictures in rapid succession as, for example, the change of an expression from grave to gay, or a face in the act of blushing. That device was considerably more primitive than the projector first invented by Uchatius, long before Greene was born. In May of 1890 Rudge showed at a meeting of the Bath Photographic Society a new optical lantern fitted with a mechanism which aimed to represent, by means of a series of photographic slides, men and animals moving as in life. That device, an improvement of the earlier Rudge projector, had one condenser to gather the light and four small projection lenses. Greene suggested the addition of the coloring effects by coating parts of the slides with pigments. However, the machine was described as unfinished, though in the _Photographic News_ of May 30th it was stated, “The effects were, from an entertainment point of view, vastly superior to those produced by Mr. Muybridge and others by the application of the Thaumatrope principle, the unpleasant jerkiness of which is well known.” But it was stated that Rudge’s machine had several serious defects. The pictures were small and limited to only a few in number. Greene also had a model and gave a demonstration in London which seemed to impress only a Mr. Chang of the Chinese Embassy, one of the invited guests. The Greene-Rudge or Rudge-Greene machine was partially the work of Mortimer Evans, a civil engineer, with whom Greene made contact in 1889. That year they applied jointly for a patent on a film device. The same year Evans sold out his interest for a reported £1,200 and Greene was in financial troubles.