Factual error: "Bonanza" is set in the 1880s. In this episode, Little Joe and a friend discover a site where a man and his wife and daughters were attacked by Apaches. A Raggedy Ann doll is among the rubble. Johnny Gruelle did not create the Raggedy Ann character until 1915.
Factual error: In a flashback episode set in the 1840s, Ben Cartwright and his former Captain are operating a ship's chandler business. A competitor accuses them of running a "flea market." That term is a translation of the French "marché aux puces" and did not enter the English language until 1922.