Just before the harmonium falters, we see the sheet music on the organ. The notated music is a completely different piece to that which is being played. This is evident in the notes on the page - no title is shown.
When Fancy is playing the harmonium for the first time in the church, one shot is taken from the former choir place and you can see Dick Dewy standing close to Fancy, although he is supposed to be away.
Robert Penny: [talking about Fancy's shoe]
You will find her delicate but robust, neighbors. Part country girl she once was, part educated lady she is now.