Cousin marriage
Spencer and Jane Perceval had thirteen children, of whom twelve survived to adulthood. Four of the daughters never married, and lived together all their lives. During their mother's life, they lived with her in Elm Grove, Ealing; after her death, the sisters moved to nearby Pitzhanger Manor House, while their brother Spencer took over Elm Grove. Cousin marriage was common: the remaining two daughters and two of the sons took this path.