While Brontë was writing Shirley, three of her siblings died. Her brother Branwell died in September 1848, and her sister Emily fell ill and died in December. Brontë resumed writing, but then her only remaining sibling, her sister Anne, became ill and died in May 1849.
It is believed that the character of Caroline Helstone was loosely based on Anne and it has been speculated that Brontë originally planned to let Caroline die but changed her mind because of her family tragedies. Shirley is what Brontë believed her sister, Emily Brontë, would have been if she had been born into a wealthy family.The maiden name of Mrs. Pryor is Agnes Grey, the name of the main character in Anne's first novel.
She was based on Margaret Wooler, the principal of Roe Head School, which Brontë attended as both student and teacher.
With her siblings she created a stupendously detailed imaginative world, and then as the threat of becoming governesses loomed over the sisters they determined to become published novelists.Thus in the Haworth Parsonage in one year, the three Bronte girls created three landmark books of English fiction: Jane Eyre, Wuthering Heights and Agnes Grey.
Charlotte Bronte was a great writer of the early 19th century. Charlotte was born on 21 April 1816 at the parsonage in Market Street in Thornton near the rapidly growing town of Bradford. Her father was Reverend Patrick Bronte. Her mother was Maria. They had 6 children. However two girls, Maria Bronte and Elizabeth Bronte died when they were children.