[1] Her father, David Rannie, was a Captain in the British merchant service, and amassed a considerable fortune in India.

[2] In 1760, with the fortune amassed through 30 years of trading with the East India Company in Calcutta, her father purchased Melville Castle.

[6] Rannie and Dundas had four children:[6][4] Her portrait was painted by David Martin in 1770; it now belongs to National Galleries Scotland.

[7] In October 1778, Rannie took a 10 day tour around East Lothian, stopping to attend a ball at the house of Mr Colt of Aldhame and Hon Mrs Helen Stewart in Musselburgh.

Here she was discovered, and later admitted via letter to her husband, to be having an affair with Captain Everard Fawkener, later a lieutenant, of the 11th dragoons (11th Hussars).

[1] Through his brother, William Augustus Fawkener, Everard held the civil service post of the Commissioner of Stamps from 1783 until his death in 1803.

[1] In 2020, in the wake of the George Floyd protests, the role of Henry Dundas in abolition was brought to light, and through that commentary appeared in the press on his marriage to then child-bride Elizabeth Rannie.