Question: When did Henry Pelham-Clinton, 6Th Duke Of Newcastle's father die?

Knowledge 1: Henry Pelham-Clinton, 6th Duke of Newcastle
Henry Pelham Alexander Pelham-Clinton, 6th Duke of Newcastle-under-Lyne (25 January 1834 – 22 February 1879) was an English nobleman, styled Lord Clinton until 1851 and Earl of Lincoln until he inherited the dukedom in 1864.Pelham-Clinton was the son of Henry Pelham-Clinton, 5th Duke of Newcastle and his wife Lady Susan Hamilton.He was educated at Eton College and Christ Church, Oxford.His political career was limited to sitting as Member of Parliament for Newark between 1857 and 1859.He did not hold any significant political offices in Nottinghamshire, although he was Provincial Grand Master of the Nottinghamshire Freemasons from 1865 to 1877.Lincoln's taste for gambling resulted in his fleeing the country in 1860 to escape his debts, which had then reached £230,000 (in excess of £26 million in 2017 terms).In 1861, he married Henrietta Hope, heiress of the wealthy Henry Thomas Hope, in Paris.As part of the marriage settlement, his debts were paid and an income of £50,000 a year settled on the couple.Extensive lands in England and Ireland were also added to his family's holdings by inheritance from his father-in-law, although Pelham-Clinton himself never controlled them due to the terms of that testament.He succeeded his father as Duke of Newcastle in 1864 and had five children with Henrietta: [SEP] Knowledge 2: Henry Pelham-Clinton, 5th Duke of Newcastle
Henry Pelham Fiennes Pelham-Clinton, 5th Duke of Newcastle-under-Lyne, (22 May 1811 – 18 October 1864), styled Earl of Lincoln before 1851, was a British politician.
Knowledge 1: Henry Pelham-Clinton, 6th Duke of Newcastle
Henry Pelham Alexander Pelham-Clinton, 6th Duke of Newcastle-under-Lyne (25 January 1834 – 22 February 1879) was an English nobleman, styled Lord Clinton until 1851 and Earl of Lincoln until he inherited the dukedom in 1864.Pelham-Clinton was the son of Henry Pelham-Clinton, 5th Duke of Newcastle and his wife Lady Susan Hamilton.He was educated at Eton College and Christ Church, Oxford.His political career was limited to sitting as Member of Parliament for Newark between 1857 and 1859.He did not hold any significant political offices in Nottinghamshire, although he was Provincial Grand Master of the Nottinghamshire Freemasons from 1865 to 1877.Lincoln's taste for gambling resulted in his fleeing the country in 1860 to escape his debts, which had then reached £230,000 (in excess of £26 million in 2017 terms).In 1861, he married Henrietta Hope, heiress of the wealthy Henry Thomas Hope, in Paris.As part of the marriage settlement, his debts were paid and an income of £50,000 a year settled on the couple.Extensive lands in England and Ireland were also added to his family's holdings by inheritance from his father-in-law, although Pelham-Clinton himself never controlled them due to the terms of that testament.He succeeded his father as Duke of Newcastle in 1864 and had five children with Henrietta: [SEP] Knowledge 2: Jacobo Fitz-James Stuart, 6th Duke of Liria and Jérica
" Don" Jacobo José María Fitzjames- Stuart y Silva, 6th Duke of Berwick, 6th Duke of Liria, 6th Duke of Jérica, Grandee of Spain( 3 January 1792 – 5 January 1795) was the second surviving son of the 5th Duke of Berwick, briefly inheriting his titles.He died at age three and two days and passed them onto his younger brother Carlos Miguel Fitz- James Stuart.
Knowledge 1: Henry Pelham-Clinton, 6th Duke of Newcastle
Henry Pelham Alexander Pelham-Clinton, 6th Duke of Newcastle-under-Lyne (25 January 1834 – 22 February 1879) was an English nobleman, styled Lord Clinton until 1851 and Earl of Lincoln until he inherited the dukedom in 1864.Pelham-Clinton was the son of Henry Pelham-Clinton, 5th Duke of Newcastle and his wife Lady Susan Hamilton.He was educated at Eton College and Christ Church, Oxford.His political career was limited to sitting as Member of Parliament for Newark between 1857 and 1859.He did not hold any significant political offices in Nottinghamshire, although he was Provincial Grand Master of the Nottinghamshire Freemasons from 1865 to 1877.Lincoln's taste for gambling resulted in his fleeing the country in 1860 to escape his debts, which had then reached £230,000 (in excess of £26 million in 2017 terms).In 1861, he married Henrietta Hope, heiress of the wealthy Henry Thomas Hope, in Paris.As part of the marriage settlement, his debts were paid and an income of £50,000 a year settled on the couple.Extensive lands in England and Ireland were also added to his family's holdings by inheritance from his father-in-law, although Pelham-Clinton himself never controlled them due to the terms of that testament.He succeeded his father as Duke of Newcastle in 1864 and had five children with Henrietta: [SEP] Knowledge 2: Henry Pelham-Clinton, 4th Duke of Newcastle
Henry Pelham Fiennes Pelham- Clinton, 4th Duke of Newcastle- under- Lyne( 31 January 1785 – 12 January 1851) was a British nobleman and politician who played a leading part in British politics in the late 1820s and early 1830s.He was styled Lord Clinton from birth until 1794 and Earl of Lincoln between 1794 and 1795.

Answer: 18 October 1864