Lady Luxborough

Henrietta Knight
Henrietta Knight, Lady Luxborough
Died	1756 (1757)
Occupation	British poet

Henrietta Knight, Lady Luxborough (died 1756), originally Henrietta St John, was an English poet and letter-writer.

She was the only daughter of Henry, viscount St. John, by his second wife, Angelica Magdalena, daughter of Georges Pillesary, treasurer-general of the marines, and superintendent of the ships and galleys of France under Louis XIV. Henry St. John, 1st Viscount Bolingbroke, was her half-brother.

Henrietta St John married, on 20 June 1727, Robert Knight of Burrells, Warwickshire. The marriage fell under an early cloud when her husband suspected her of an affair with Charles Peters, her physician. Horace Walpole describes her as wearing a portrait of her husband in her hair. Another suspicion caused the breakdown of the marriage. John Dalton was a tutor in the household of the Hertfords, where Frances Seymour, Countess of Hertford, was Henrietta's friend. Knight found love letters from Henrietta to Dalton, accused her of becoming pregnant by him, and arranged a separation, in 1736.

Henrietta Knight went to live on her husband's estate at Barrells Hall, which she had laid out in the artificial style of landscape gardening. Here she was within easy reach of her friend and correspondent William Shenstone, whom she frequently visited at The Leasowes, and with whom she kept up a regular correspondence. Shenstone celebrated their somewhat artificial Arcadia in his ode on Rural Elegance, addressed to the Duchess of Somerset (1750). Another friend was the poet William Somervile.

Dying towards the end of March 1756, Henrietta Knight and was buried in the church of Wootton Wawen; her remains were later removed to a mausoleum near Barrells Halls. She had been assumed to share her half-brother's atheism, but took the sacrament on her deathbed.

Lady Luxborough's Letters to William Shenstone, Esq. were published by Robert Dodsley, London, 1775. Four poems, printed as "by a lady of quality" in Dodsley's Collection of Poems by several hands (1775), iv. 313, are attributed to her by Horace Walpole. Other correspondence appeared in Thomas Hull's Select Letters between the late Duchess of Somerset, Lady Luxborough … and others, London, 1778, 2 vols.