A character says "Dvorák played the piano and talked about composing." The episode takes place in 1882 in New York City. Dvorák did not come to New York until 1892.
In the beginning of the series you can see two horses pulling a carriage. Two light beige colored horses with short black and white manes. This breed is Norwegian Fjord Horse and first Fjord horse arrived in the USA 1888 and the breed was extremely rare until 1950. Year in this episode is 1882 so six years before the first Fjord horse was in the country.