Madame Jerome Bonaparte, who was in Europe at the time of her sister-in-law's second marriage, thus wrote to her father concerning it:
"Havre, November 21, 1825.
"Dear Sir,—I write by this packet to announce to you the marriage of Mrs. Robert Patterson. Mrs. Brown received a letter from Betsy Caton the day on which it was to take place. She has made the greatest match that any woman ever made.... The Marquis of Wellesley is Lord Lieutenant of Ireland. He is sixty-five. He married an Italian singer, by whom he had a family of children. She is dead. He has no fortune. On the contrary, he is over head and ears in debt. His salary is £35,000 per annum as Lord Lieutenant of Ireland. He will be there eighteen months longer, and if the King does not give him another place he is entitled as a poor nobleman to at least a thousand pounds a year. He is brother of the Duke of Wellington. Mary's fortune is reported in Europe to be £800,000 cash. It has been mentioned in all the papers at that sum."
Wellesley retained his position in Ireland till 1828. He was then appointed Controller of the Royal Household of William IV., and his wife first lady in waiting at Windsor Castle. Wellesley's death occurred in 1842, the Marchioness surviving him over eleven years. The latter part of her life was spent at the Royal Palace at Hampton Court, where Queen Victoria presented her with a house in recognition of her husband's services.
Louisa Caton was married for the second time in 1828 to the eldest son of the Duke of Leeds, Francis Godolphin D'Arcy Osborne, Marquis of Carmarthen, who came into his title and estates ten years later.
This marriage called forth another letter from Madame Jerome Bonaparte to her father: "Louisa has made a great match. He is very handsome, not more than thirty-eight, and will be a duke with £30,000 a year."
Elizabeth Caton married once, and that much later in life than her sisters. She became, in 1836, the wife of Baron Stafford, whose family name was Jerningham.
Emily Caton, the youngest of the four sisters, and the only one who left descendants, married John Mactavish, a Scotchman, who had settled in Canada, whence he was sent as consul to Baltimore. Josiah Quincy, who met her at dinner at her grandfather's in 1826, recorded in his journal that he had been much impressed with her air of high breeding.