Around 1819 Elizabeth Denison Marchioness Conyngham (age 49) replaced Isabella Anne Ingram Marchioness Hertford (age 59) as the mistress of King George IV of Great Britain and Ireland (age 56).

Before 1830. Thomas Lawrence (age 60). Portrait of Elizabeth Denison Marchioness Conyngham (age 60).

Greville Memoirs. 21 Jul 1830. I came and established myself here last night after the Duchess of Bedford's ball. Lady Bathurst (age 64) told me that the Queen spoke to her yesterday morning about the King's walk and being followed, and said that for the future he must walk early in the morning, or in some less public place, so there are hopes that his activity may be tamed. He sent George Fitzclarence off from dinner in his silk stockings and cocked hat to Boulogne to invite the King of Würtemberg to come here; he was back in fifty-six hours, and might have been in less. He employs him in everything, and I heard Fitzclarence yesterday ask the Duke of Leeds for two of his father's horses to ride about on his jobs and relieve his own, which the Duke agreed to, but made a wry face. [her husband] Mount Charles (age 63) has refused to be Lord of the Bedchamber; his wife (age 61) can't bear it, and he doesn't like to go to Windsor under such altered circumstances. I hardly ever record the scandalous stories of the day, unless they relate to characters or events, but what relates to public men is different from the loves and friendships of the idiots of society.