About forty letters of sons and daughters of George III. to the Countess of Mayo, early 19th c.

Míreanna comhchosúla

• Obituary of Geraldine, Countess of Mayo.
  de réir: Sadleir, Thomas Ulick
  Foilsithe / Cruthaithe: (1935)
• Old Dublin mansion-houses. Appendix. Notes on the Countess of Brendon, the Viscounts Mayo, the Barony of Athenry.
  Foilsithe / Cruthaithe: (1895)
• Letters to anne, Countess of Upper Ossory re family and society matters, c.1785-1794.
• Letter to Anne, Countess of Clanbrasill, from Robert Mossom in London regarding the death of her son, Viscount Claneboye, 11 May 1658.
• "Fitz-Gerald ou Le Comte de Kildare. Tragédie on cinq actes ...", by Count Thomas A. de Lally-Tollendal; with autograph letter of the author to the Countess of Kildare, 3 June 1821.