Helen Beatrix Potter was an English author and illustrator, botanist, and conservationist, best known for her children's books, which featured animal characters such as Peter Rabbit. Potter published 23 children's books, and having become financially independent of her parents, was able to buy a farm in the Lake District, which she extended with other purchases over time. In her forties she married a local solicitor, William Heelis. She became a sheep breeder and farmer while continuing to write and illustrate children's books. Potter died in 1943, and left almost all of her property to The National Trust in order to preserve the beauty of the Lake District as she had known it, protecting it from developers.