How were the authors of the 19th century works, "Villette", "Remembrance" and "The Tenant of Wildfell Hall", related?

Question

Which 19th century author improved the system of signalling at sea and wrote "Mr Midshipman Easy", "Masterman Ready" and "The Children of the New Forest"?

Answer 1

They were sisters
The authors were, respectively, Charlotte, Emily and Anne Brontë. They published initially under the non-female names of Currer, Ellis and Acton Bell.