Gaius Julius Solinus was the third century Latin author of De mirabilibus mundi or The Wonders of the World. Adam of Bremen referenced his work as a source for more information about Himatopodes who ran around on one leg and eat human flesh. "Thus it is better to say no more about them, and it is wise to avoid them."
Consider then the Viking reference to monopods encountered upon a remote island discovered while returning to Greenland from Vinland. One must wonder, eh? Sailors' imaginations? Mythical creatures? Or natural fauna defying description (e.g. giant squid v. mermaid)?
By the way, "himatopode" is without wikipedia reference ...