Two previous episodes are referred to in this episode. The first: Mr. Edwards's Homecoming (they remember how Charles rescued him from the saloon). The second: The Love of Johnny Johnson. After this episode, Johnny is never heard from again.
In the fist scene inside the Glass Slipper Saloon there is a man seated on a bench in front of a piano that is playing a ragtime type song by itself from a roll of paper. The first player piano, the pianola, wasn't invented until 1897...3 years after the series of Little House books were documenting, 1870-1894.