There is an early St. Louis steam car that has so far escaped the author's documentation efforts.
"The car in this ad for the St Louis Motor Carriage Company, 1211 N Vandeventer Ave, St. Louis MO. This company founded by John L French and George P Dorris manufactured only gasoline autos from 1899 to 1905 when the company assets were moved to Peoria IL and started a new company the St Louis Motor Car Co. Peoria IL and produced gasoline cars into 1907.
To the best of my knowledge and from the research that I have done, they never built a steam car. This company in St Louis manufactured some parts for A.L. Dyke. Dyke sold Steam Kit Cars and there is one at the Museum of Transportation in St Louis County." 
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