How is Adeline finally able to convince her father to allow her to attend university? (Chapter 21)

In Chapter 21, Adeline is called home and afraid that she will be married off. Instead, Father expresses his great pride in her victory in the International Playwriting Competition, an award pointed out to her by his work acquaintance. In his state of pride and jubilance, Father agrees to allow her to go to school in England to become an obstetrician. Adeline is overjoyed.