Cartwright was born at Edgcote, Northamptonshire, into a respected Northamptonshire family, the daughter of Richard Aubrey Cartwright and Hon Mary Fremantle, daughter of Thomas Fremantle, 1st Baron Cottesloe.
Cartwright was born at Edgcote, Northamptonshire, into a respected Northamptonshire family. The daughter of Richard Aubrey Cartwright and Hon Mary Fremantle, daughter of Thomas Fremantle, 1st Baron Cottesloe.