David Carnegie Andrew Agnew, Protestant Exiles from France… (1886)
“ The Duchess died 13th January 1804, leaving an only child, Lady Mary Elizabeth Bertie, the first wife of Thomas Charles Colyear, fourth and last Earl of Portmore, whose son Brownlow, Viscount Milsington (heir-at-law of the Duke of Ancaster) , died before him, being mortally wounded by banditti near Rome, in 1819. ”
