An interesting article about steam cars:-
http://autospeed.com.au/cms/A_109206/article.html?popularArticle (http://autospeed.com.au/cms/A_109206/article.html?popularArticle)
There was a story on Motormate on 72 Mate on the history of the car, and at about 1900, most cars in America were steam powered, and who invented the car..... no-one in particular, they just kept making improvements, Colin.