by
John Hoppner, 1790 In 1790, after returning from France, Dorset married twenty-three-year-old
Arabella Diana Cope (1767–1825), daughter and co-heiress of
Sir Charles Cope, 2nd Baronet, and stepdaughter of
Charles Jenkinson, 1st Earl of Liverpool. Dorset and Arabella had one son together,
George John Frederick, who was born on 15 November 1793, and two daughters,
Lady Mary Sackville, born on 30 July 1792, and Lady
Elizabeth Sackville, born on 11 August 1795. The Duke died in 1799, aged 54, and left a life interest in his estates and free disposition thereof (in case of the death of their young son) to his wife. At his death, Arabella was thus a very wealthy heiress and from 1799 until her own death in 1825, Arabella, Duchess of Dorset (as she preferred to be known) controlled the Sackville estates and wealth in trust for their son. She remarried his friend,
Charles Whitworth, in 1801, who became 1st Earl Whitworth, but had no further issue. George
John Frederick became the 4th Duke of Dorset on his father's death at the family seat,
Knole House, near
Sevenoaks,
Kent at age 6, but spent the rest of his life under the legal and financial control of his mother and stepfather. He died in a riding accident in Ireland, aged 21 having just become engaged to Lady Elizabeth Thynne (born 1795), elder daughter of
Thomas Thynne, 2nd Marquess of Bath. (She went on to marry October 1816
Lord Cawdor and have many children). Although the dukedom passed to his cousin
Charles, Viscount Sackville, the estates remained at the disposition of Arabella until her own death in 1825, when Knole went to her elder daughter Mary, Countess of Plymouth, and
Buckhurst and the Middlesex lands (of the Cranfield family) to her younger daughter Elizabeth, Countess De La Warr.
Lady Mary Sackville had married firstly
Other Windsor, 6th Earl of Plymouth (1789–1833) on 5 August 1811 and secondly her first husband's stepfather
William Amherst, 1st Earl Amherst on 25 May 1839. She died childless on 20 July 1864, leaving her estates to her sister
Countess De La Warr and her heirs male. The Countess De La Warr was created Baroness Buckhurst in her own right (a title later inherited by a younger son Reginald, who is ancestor of the present Earl De La Warr). Another line stemming from this lady is that of the
Barons Sackville, a title created in compensation for losing the Buckhurst title. The 1st Baron Sackville inherited Knole, according to the will of Mary, Countess of Plymouth. (He died unmarried, as did his brother the 2nd Baron). Their nephew, the 3rd Baron Sackville, was father of the writer
Vita Sackville-West who created a garden at
Sissinghurst. Knole House, still lived in by the Sackville-West family, and Sissinghurst, the family home of
Lord Carnock have both been given to the
National Trust. ==References==