Gronow-Davis was the partner of Michael Pitt-Rivers, conservationist and owner of the Rushmore Estate, and moved to King John’s House, near the estate at
Tollard Royal, Wiltshire in 1961. Their relationship began after Pitt-Rivers' marriage ended in 1965. When Pitt-Rivers died in 1999, the Trust which runs the estate was inherited by Gronow-Davis. == Rushmore Estate ==