Assertion: american roper steam velocipede | /r/HasProperty | built by sylvester h. roper roxbury
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text: If a two-wheeled vehicle with steam propulsion is considered a motorcycle, then the first motorcycles built seem to be the French Michaux-Perreaux steam velocipede which patent application was filled in December 1868, constructed around the same time as the American Roper steam velocipede, built by Sylvester H. Roper Roxbury, Massachusetts. who demonstrated his machine at fairs and circuses in the eastern U.S. in 1867, Roper built about 10 steam cars and cycles from the 1860s until his death in 1896.