It was the ancestral home of the Cavendish family. It was the home of Emily Inglethorp and her husband Alfred. After her death it was inherited by her stepson, from her previous marriage to Mr Cavendish, John Cavendish. John inherited it and subsequently put the house up for sale.
According to Hastings, Styles was a house with a very dark history, as four people died there: Mrs Inglethorp, Mrs Barbara Franklin, Stephen Norton and no one other than Hercule Poirot.
In The Mysterious Affair at Styles
- Emily Inglethorp, wealthy owner of the estate
- Alfred Inglethorp, Emily's husband
- Evelyn Howard, Emily's companion who appears to dislike Alfred
- John Cavendish, Emily's stepson
- Mary Cavendish, John's wife
- Lawrence Cavendish, John's brother
- Cynthia Murdoch, orphan, daughter of a friend of Emily
- Dorcas, a maid
- Hercule Poirot
- Arthur Hastings
- Sir William Boyd Carrington
- Elizabeth Cole
- Stephen Norton
- Judith Hastings
- Dr Franklin
- Barbara Franklin
- Nurse Craven
The large Victorian rooms at Styles were turned into smaller modern ones. The bathrooms were renewed, and the study room was turned into the laboratory of John Franklin. One of the only rooms that was kept like the original with the exception of new finishings was the one where Arthur Hastings stayed.