Sophia Carteret (26 August 1745 - 5 January 1771), was the only daughter of John Carteret, 2nd Earl Granville, by his second marriage to Sophia Fermor, daughter of the 1st Earl of Pomfret and his wife, Henrietta Louisa (née Jeffreys, the Countess of Pomfret, 1698-1761). She married in 1765 William Petty, 2nd Earl of Shelburne (1737-1805, later Marquis of Lansdowne and Prime Minister). Her aunt, Lady Charlotte Finch, was Governess of the Royal Nursery from 1762. Sophia was educated by Mme Le Prince de Beaumont (author of The Young Ladies’ Magazine). Her diary survives and is excerpted in the Life of William, Earl of Shelburne (London, Macmillan 1875, 76, second revised edition 1912) (and is among the Shelburne papers, presumably still at Bowood House). Lady Pomfret’s diaries and correspondence survive in the Leicester Record Office. See also Correspondence between Frances, Countess of Hartford, (afterwards Duchess of Somerset,) and Henrietta Louisa, Countess of Pomfret, between the years 1738 and 1741. In three volumes. (London, printed for Richard Phillips, 1805 and, ed. 2, 1806.) After the death of Sophia née Carteret her husband married Maria Arabella (née Maddox or Maddock) widow of Duke Gifford or Giffard. She died in 1833. Perhaps Louisa was her daughter by Duke Gifford. There were two Wycombe Lodges, one in Kensington, on the site of the present Wycombe Square, and one on Hughenden Road, Wycombe. The former is mentioned in GEC, s.v. John Henry (Petty) Second Marquis of Lansdowne and is almost certainly the one in question, the latter being a very modest dwelling.