 The engraver and cartographer John Spilsbury, of London, is believed to have produced the first jigsaw puzzle around 1760, using a marquetry saw.Early jigsaws, known as dissections, were produced by mounting maps on sheets of hardwood and cutting along national boundaries, creating a puzzle useful for the teaching of geography.Such "dissected maps" were used to teach the children of King George III and Queen Charlotte by royal governess Lady Charlotte Finch.