What happened to Nollie? How was Corrie involved in Nollie's release?

In order to help Nollie, Pickwick advises Corrie to visit the German doctor in charge of the prison in Amsterdam who is reputedly a humane man. Waiting in the doctor’s foyer, Corrie wonders how to reach this man. She thinks of the book the Beje group has been reading, “How to Win Friends and Influence People” and decides to find where the doctor’s interests lie. Upon seeing his three Dobermans, she guesses correctly that dogs are the man’s hobby. Corrie begins a conversation about how much she loves dogs and the man seems pleased. He promises to do what he can. Two weeks later, Corrie returns to be told that these things take time. In October, a pale but cheerful Nollie is released upon the doctor’s advice that her dangerously low blood pressure could leave her a burden to the state.