W. H. Dutcher, the Great Roller Skate Contortionist

"W. H. Dutcher of New York City, the Great Roller Skate Contortionist, is open for dates and can be engaged by responsible managers. W. F. Orr, manager, North Adams, Mass."

A nineteenth-century business card for a "roller skate contortionist" named W. H. Dutcher. Wikipedia mentions a Carola Trier who performed as a "roller-skating contortionist" in the 1940s or 1950s, and the Richmond Dispatch newspaper, October 27, 1885, p. 2, contained an ad for the Richmond Skating School, which sponsored an appearance by "H. H. Golden, Champion Roller-Skate Contortionist."

The only contortionist I've heard about previously was a stationary one--see Knoto (below).