Please go to <a href="http://www.severalworld.co.uk/engineering-timelines/timelines.html/who/Trevithick_R/puffingDevil_240x248_TTS.jpg">http://www.severalworld.co.uk/engineering-timelines/timelines.html/who/Trevithick_R/puffingDevil_240x248_TTS.jpg</a>