Final answer:
In Charlotte Brontë's 'Jane Eyre', it is St. John Rivers who informs Jane about the inheritance left to her by her uncle, John Eyre, after receiving a letter from the uncle's lawyer.
Step-by-step explanation:
In Charlotte Brontë's novel Jane Eyre, Jane's inheritance is a significant plot point. It is not St. John who writes to Jane about her inheritance; instead, it is discovered that John Eyre, Jane's uncle who lived in Madeira, had left her a substantial inheritance. St. John Rivers, the clergyman who befriends Jane later in the novel, is the one who eventually informs Jane about her uncle's bequest after receiving a letter from John Eyre's lawyer. This inheritance plays a crucial role in the development of the novel's plot and dramatically impacts Jane's life.