Final answer:
The passage may inadvertently reference a situation from Henrik Ibsen's play 'A Doll's House' and not 'The Book Thief.' In 'The Book Thief,' there is no note associated with Hans returning from the Amper River.
Step-by-step explanation:
The question pertains to the book The Book Thief, but unfortunately there seems to be a mix-up. In The Book Thief, there isn't an event where Hans returns from the Amper river with a note. The confusion may arise from conflating two different works. Based on the context provided, the notes seem to be related to Henrik Ibsen's play A Doll's House, where characters like Krogstad and Mrs. Linde exchange correspondence that significantly affects the story's outcome. In this play, the characters are dealing with the fallout of a forged signature and its implication on their lives, rather than an event involving Hans and a return from the Amper River.