Later, and equally unverified, is the contention that a certain "Comte de Sivrac" developed a "célérifère" in 1792, demonstrating it at the Palais-Royal in France. The "célérifère" supposedly had two wheels set on a rigid wooden frame and no steering, directional control being limited to that attainable by leaning. A rider was said to have sat astride the machine and pushed it along using alternate feet. It is now thought that the two-wheeled "célérifère" never existed (though there were four-wheelers) and it was instead a misinterpretation by the well-known French journalist Louis Baudry de Saunier in 1891.