Personal letters addressed to Harriet Thiebault, nee Thayer at various residences in England, France and Germany from numerous correspondents. Only about 10 of the letters predate her marriage in late 1822.
Her correspondents included Elizabeth Griffiths, 1816-20; Margaret Sinclair, 1819-23; Elizabeth Anne Leven, 1831-1859; Elizabeth Elgin and her daughters Augusta and Charlotte Bruce, 1836-1858; Anne Pennington, 1846-1852; members of the Bowles family, 1846-1854; Vicomte de Santarem, 1835-1836; Comte de Vaudreuil, 1823-1824, Madame Massone, 1842-1850 and others. There is also a letter from her daughter after her marriage. Correspondents' names and the date of the letter have been added to the top of some correspondence, occasionally with explanatory notes about the correspondent's identity, possibly in Harriet Thiebault's hand.
The majority of the correspondence is concerned with the social activities and leisure interests of Harriet Thiebault and her friends and acquaintainces, both in Britain and France. Letters include news of society events during the London Season and in Paris, including balls, operas and soirees to which she was invited by French aristocrats. Society gossip and news of mutual acquaintances is also a common topic of discussion. Some letters discuss Harriet's reading matter, including works of philosophy and natural history. A number of letters, particularly those written during the 1820s and 1830s, also refer to political matters, and provide brief comment on wider events including the 1832 cholera epidemic and its effects in Britain and France, the Irish famine in 1846, and unrest in Paris in 1848.
The collection also includes some letters to Harriet's daughter, Henriette Malvina, known as Nina who subsequently married Captain Otway Inglefield