Question: When did Charles Sackville-West, 6Th Earl De La Warr's father die?

Lionel Sackville-West, 3rd Baron Sackville
Lionel Edward Sackville- West, 3rd Baron Sackville( 15 May 1867 – 28 January 1928), was a British peer.
Sackville- West was the son of the Honourable William Edward Sackville- West, sixth son of George Sackville- West, 5th Earl De La Warr and Lady Elizabeth Sackville.
His mother was Georgina, daughter of George Dodwell.
He inherited the barony in 1908 on the death of his uncle, the diplomat Lionel Sackville- West, 2nd Baron Sackville.
In April 1912, Lord Sackville was appointed a deputy lieutenant of Kent.
He married his first cousin Victoria Sackville- West( 1862–1936) in 1892, illegitimate daughter of the second Baron, in 1890.
Their daughter was the novelist and poet Vita Sackville- West.
Charles Sackville-West, 6th Earl De La Warr
Major-General Charles Richard Sackville-West, 6th Earl De La Warr (13 November 1815 – 23 April 1873), styled Lord West between 1850 and 1869, was a British soldier.
Sackville-West was the second son of George Sackville-West, 5th Earl De La Warr, and Lady Elizabeth Sackville, daughter of John Sackville, 3rd Duke of Dorset.
He was the brother of George West, Viscount Cantelupe, Reginald Sackville, 7th Earl De La Warr, Elizabeth Russell, Duchess of Bedford, Mortimer Sackville-West, 1st Baron Sackville, and Lionel Sackville-West,
2nd Baron Sackville.
He was educated at Harrow.
Sackville-West served in the British Army and was appointed aide-de-camp and military secretary to Sir Hugh Gough in India in 1845.
He fought at the Battle of Sobraon in 1846 during the First Anglo-Sikh War.
In 1850 he became known by the courtesy title Lord West after the death of his elder brother, Lord Cantelupe.
Promoted to major in 1852 and to lieutenant-colonel in 1855, he served in the Crimean War.
He was appointed a Companion of the Order of the Bath in 1855 and an Officer of the Legion of Honour in 1856 and awarded the Order of the Medjidie in 1858.
In 1864 he was promoted to major-general.
He succeeded his father in the earldom in 1869.
In 1871 he was made a Knight Commander of the Order of the Bath (KCB).
Lord De La Warr died in April 1873, aged 57, by drowning himself in the River Cam.
He was unmarried and was succeeded in the earldom by his younger brother, Reginald, Lord Buckhurst.
Roger la Warr, 3rd Baron De La Warr
Roger la Warr, 3rd Baron De La Warr (died 1370) was an English nobleman.
Herbrand Russell, 11th Duke of Bedford
Herbrand Arthur Russell, 11th Duke of Bedford( 19 February 1858 – 27 August 1940) was an English politician and peer.
He was the son of Francis Russell, 9th Duke of Bedford and his wife Lady Elizabeth Sackville- West, daughter of George Sackville- West, 5th Earl De La Warr.
George Sackville-West, 5th Earl De La Warr
George John Sackville-West, 5th Earl de la Warr, PC (26 October 1791 – 23 February 1869), styled Viscount Cantelupe until 1795, was a British courtier and Tory politician.
George West, Viscount Cantelupe
George John Frederick West, Viscount Cantelupe( 26 April 1814 – 25 June 1850), was a British politician.
Styled Viscount Cantelupe from birth, he was the eldest son of George Sackville- West, 5th Earl De La Warr, by Lady Elizabeth Sackville, daughter of John Sackville, 3rd Duke of Dorset.
He was the elder brother of Major- General Charles Sackville- West, 6th Earl De La Warr, Mortimer Sackville- West, 1st Baron Sackville, Lionel Sackville- West, 2nd Baron Sackville and Elizabeth Russell, Duchess of Bedford.
He was educated at Christ Church, Oxford.
Lord Cantelupe served in the Grenadier Guards, reaching the rank of lieutenant.
In 1837 he was returned to Parliament for Helston, a seat he held until 1840, and then represented Lewes until 1841.
He died unmarried in June 1850, aged 36, predeceasing his father.
His younger brother Charles eventually succeeded in the earldom.
William Sackville, 10th Earl De La Warr
William Herbrand Sackville, 10th Earl De La Warr (16 October 1921 – 9 February 1988) was a British peer.
He inherited the earldom on 28 January 1976 on the death of his father Herbrand Edward Dundonald Brassey Sackville, 9th Earl De La Warr.
Earl De La Warr was educated at Eton College, and fought in World War II, attaining the rank of Captain in the Parachute Regiment of the British Army.
After the war, on 18 May 1946, he married Anne Rachel Devas (grandniece of a former Prime Minister, Sir Henry Campbell-Bannerman).
They had three children:
In the autumn of 1987, the earl offered to sell Ashdown Forest, the real-life setting of the Winnie-the-Pooh stories, to the East Sussex County Council at a below-market price of £1.2 million for the 6,500 acre property.
As young children, the future earl and Christopher Robin Milne had played together there.
Milne himself joined conservationists to prevent the forest from being sold piecemeal to private owners, and to oppose an application by BP to drill for oil there.
The sale to the county council was concluded after the earl's death, making the forest public land.
On 9 February 1988, at age 66, Earl De La Warr died after falling under a train at the St. James's Park station of the London Underground.
An inquest ruled the death to be a suicide, with a jury finding that the earl had been "anxious and upset over hurricane damage to his estate."
Mortimer Sackville-West, 1st Baron Sackville
Mortimer Sackville- West, 1st Baron Sackville( 22 September 1820 – 1 October 1888), was a British peer and court official.
Sackville- West was the fourth son of George Sackville- West, 5th Earl De La Warr, and Elizabeth Sackville, 1st Baroness Buckhurst, younger daughter and co-heir of John Sackville, 3rd Duke of Dorset.
On the death of his kinsman Charles Sackville- Germain, 5th Duke of Dorset, in 1843, the dukedom and its subsidiary titles became extinct.
Large parts of the Sackville estates passed to the West family through Elizabeth.
The Sackville- Wests inherited parts of the estates by arrangement, notably the estate of Knole Park in Kent.
During his career Sackville- West held several high appointments within the Royal household.
In 1876 he was raised to the peerage as Baron Sackville, of Knole in the County of Kent.
The peerage was created with special remainder, failing heirs male of his body, to his younger brothers Lionel and William Edward.
He died in 1888, aged 68, and was succeeded in the barony according to the special remainder by his younger brother Lionel.
Elizabeth Russell, Duchess of Bedford
Elizabeth Russell, Duchess of Bedford VA(" née" Sackville- West; 23 September 1818 – 22 April 1897) was born the daughter of the 5th Earl De La Warr and his wife Lady Elizabeth Sackville.
William Sackville, 11th Earl De La Warr
William Herbrand Sackville, 11th Earl De La Warr( born 10 April 1948) is a British nobleman and peer.
He was styled Lord Buckhurst from 1976 until 9 February 1988, when he inherited upon the death of his father William Sackville, 10th Earl De La Warr.

Answer: 23 February 1869