The arms are those of Conyngham quartering Denison, as borne by Henry (Conyngham), 1st Marquess Conyngham (1766-1832) and his wife, Elizabeth (Denison), Marchioness Conyngham (d. 1861).
The Marchioness Conyngham (d. 1861) was the last mistress of George IV, and he was the last on her list of noteworthy lovers which included Henry Lord Ponsonby and Tsar Nicholas I. (Saul David, Prince of Pleasure, 1998, pp. 390, 421-22). Dubbed the "English Pompadour," she exerted great influence over the King and capitalized upon her personal friendship to secure positions for her family and friends. Whether she stayed with the King at Windsor or at Brighton, she was encouraged to conduct herself as mistress of the household. She frequently used the King's horses and carriage, wore the Crown Sapphires, and had meals for her private dinner parties prepared at St. James's Palace. The privileges she enjoyed while mistress ended with the King's death only a few years later, and the Marquess and Marchioness faded into the background of society.
Three second course dishes and a pair of meat dishes, also engraved with the Royal arms and those of the 1st Marquess Conyngham, by Philip Rundell, 1822, sold at Christie's, London, 10 February, 1938.
CAPTION: Lady Conyngham, mistress of George IV, with Philip Rundell, inside Rundell, Bridge & Rundell, 32 Ludgate Hill, published by S.W. Fores, 1822