Mustard (condiment) mixed with horseradish and dried for storage, which were then exported to London and other parts of the country, and are even mentioned in William Shakespeare's play "King Henry the Fourth, Part II". The use of mustard as a hot dog condiment is said to have been first seen in the US at the 1904 St. Louis World's Fair, when the bright-yellow French's mustard was introduced by the R.T. French Company. Mustard is most often used at the table as a condiment on cold meats.It is also used as an ingredient in mayonnaise, vinaigrette, marinades, and barbecue sauce. It is
History of St. Louis World's Fair and 1904 Summer Olympics, which were held concurrently in St. Louis. During the Civil War, the infrastructure of St. Louis suffered from neglect; another cholera epidemic struck in 1866, and typhoid fever raged. In response, St. Louis improved its water system and established a Board of Health to regulate polluting industries. St. Louis's park system was expanded during the 1860s and 1870s, with the creation of Tower Grove Park and Forest Park. Railroad connections with the southwest and Texas were improved during the 1870s, with the formation of the Cotton Belt Railroad. In addition to connecting St. Louis