Mrs Fotheringham
See NA SP 36/77/1/134: "Observations on intercepted letters from the rebels [Jacobites] sent by duke of Devonshire to duke of Newcastle. Considered are letters to Mrs David Fotheringham, wife of the rebels' [Jacobites'] governor of Dundie [Dundee] from her son [...] All are dated from Derby on 5 or 9 December 1745."