Continuity mistake: Toward the end of the film, Elinor is gardening and has dirt and mud all over her hands. Upon realising Edward is riding toward the house, she hurriedly wipes her hands on her apron, smearing a good amount of dirt on it. When she then removes the apron while standing inside the house, both the apron and her hands are barely dirty.
Continuity mistake: In the scene where Lucy Steele admits to Fanny Dashwood that she is secretly engaged to Edward, Lucy starts the scene holding a lapdog. When Fanny explodes and attacks Lucy, the dog has disappeared from the set.
Answer: This song is titled "Father's Favourite" on the movie soundtrack and you can listen to a sample here: http://www.amazon.com/exec/obidos/tg/detail/-/B0000029OJ/102-6262984-3788106?v=glance. You can also purchase sheet music for the song here: http://www.sheetmusicplus.com/store/smp_detail.html?sku=HL.351503&cart=33192619781507038&searchtitle=sheet music&type=rec.
Steph_Jared