William Cavendish, 4th Duke of Devonshire

The Duke of DevonshireDuke of DevonshireMarquess of HartingtonDevonshire4th Duke of DevonshireWilliam Cavendish, Marquess of HartingtonThe 4th Duke of DevonshireWilliam Cavendishfourth Duke4th Duke
William Cavendish, 4th Duke of Devonshire, (8 May 1720 – 2 October 1764), styled Lord Cavendish before 1729 and Marquess of Hartington between 1729 and 1755, was a British Whig statesman and nobleman who was briefly nominal Prime Minister of Great Britain.wikipedia
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Writ of acceleration

writ in accelerationcalled up to the House of Lordscalled to the House of Lords
Pelham appointed him Master of the Horse, a post he held until 1755 and which necessitated his leaving the House of Commons for the House of Lords by writ of acceleration as Baron Cavendish and joining the Privy Council.
For example, William Cavendish, Marquess of Hartington, heir apparent of William Cavendish, 3rd Duke of Devonshire, was summoned as Baron Cavendish of Hardwick.

Duke of Devonshire

Dukes of DevonshireMarquess of HartingtonDevonshire
Devonshire succeeded his father as Duke of Devonshire in December 1755 after his death.
On his death the titles passed to his eldest son, the fourth Duke, who was a prominent politician.

Catherine Cavendish, Duchess of Devonshire

the former Catherine HoskinsCatherine Hoskins, or Hoskyn
He was the first son of William Cavendish, 3rd Duke of Devonshire and his wife, the former Catherine Hoskins.
The duke died in 1755 and was succeeded by their eldest son, William, to whose marriage to the exceptionally wealthy Lady Charlotte Boyle Catherine was bitterly opposed.

First Lord of the Treasury

First LordPrime Ministerappointed
Devonshire was given the Garter and appointed First Lord of the Treasury (most historians consider him Prime Minister during this service) in November 1756, and he served as First Lord until May 1757 in an administration effectively run by William Pitt.

William Pitt, 1st Earl of Chatham

William PittWilliam Pitt the ElderPitt
Devonshire was given the Garter and appointed First Lord of the Treasury (most historians consider him Prime Minister during this service) in November 1756, and he served as First Lord until May 1757 in an administration effectively run by William Pitt.
In December 1756, Pitt, who now sat for Okehampton, became Secretary of State for the Southern Department, and Leader of the House of Commons under the premiership of the Duke of Devonshire.

William Cavendish, 3rd Duke of Devonshire

The Duke of DevonshireMarquess of Hartington3rd Duke of Devonshire
He was the first son of William Cavendish, 3rd Duke of Devonshire and his wife, the former Catherine Hoskins.

Lord Lieutenant of Ireland

Lord-Lieutenant of IrelandLord LieutenantViceroy of Ireland
Devonshire supported the Duke of Newcastle after Henry Pelham's death in 1754 and was Lord Lieutenant of Ireland from 2 April 1755 until 3 January 1757 in Newcastle's administration.
Two Lords Lieutenant, Lord Hartington and the Duke of Portland, went from Dublin Castle to 10 Downing Street as Prime Minister of Great Britain, in 1756 and 1783 respectively.

Charlotte Cavendish, Marchioness of Hartington

Lady Charlotte BoyleCharlotteCharlotte Boyle, 6th Baroness Clifford
He married Lady Charlotte Elizabeth Boyle, 6th Baroness Clifford (1731–1754), the daughter and heiress of Richard Boyle, 3rd Earl of Burlington of the first creation, a famous architect and art collector.
From 1748 until her death she was married to William Cavendish, Marquess of Hartington, later the 4th Duke of Devonshire and Prime Minister of Great Britain.

Chiswick House

ChiswickChiswick House asylum
Through her, the Devonshires inherited Chiswick House and Burlington House in London; Bolton Abbey and Londesborough Hall in Yorkshire; and Lismore Castle in County Waterford, Ireland.
After the death of its builder and original occupant in 1753 and the subsequent deaths of his last surviving daughter, Charlotte Boyle in 1754, and his widow in 1758, the property was ceded to William Cavendish, 4th Duke of Devonshire, Charlotte's husband.

John Russell, 4th Duke of Bedford

Duke of BedfordThe Duke of Bedford4th Duke of Bedford
It was replaced by the Pitt–Newcastle ministry headed by the Duke of Newcastle and including Pitt, Henry Fox and the Duke of Bedford.
After Newcastle's resignation in November 1756, Bedford became Lord Lieutenant of Ireland in the new government led by William Pitt and the Duke of Devonshire.

Thomas Pelham-Holles, 1st Duke of Newcastle

Duke of NewcastleThe Duke of NewcastleThomas Pelham-Holles, 1st Duke of Newcastle-upon-Tyne
Devonshire supported the Duke of Newcastle after Henry Pelham's death in 1754 and was Lord Lieutenant of Ireland from 2 April 1755 until 3 January 1757 in Newcastle's administration.
Newcastle was widely blamed for Britain's poor start to the Seven Years' War, and in November 1756 he was replaced by the Duke of Devonshire.

George II of Great Britain

George IIKing George IIKing George II of Great Britain
The Seven Years' War was going badly for Britain under the leadership of the Duke of Newcastle and when he resigned in October 1756, George II eventually asked Devonshire to form an administration.
Public disquiet over British failures at the start of the conflict led to Newcastle's resignation and the appointment of William Cavendish, 4th Duke of Devonshire, as prime minister and William Pitt the Elder as Secretary of State for the Southern Department.

William Cavendish, 5th Duke of Devonshire

William CavendishDuke of Devonshire5th Duke of Devonshire
He was the eldest son of William Cavendish, 4th Duke of Devonshire, by his wife, the heiress Lady Charlotte Boyle, suo jure Baroness Clifford, who brought in considerable money and estates to the Cavendish family.

Pitt–Newcastle ministry

Pitt–Newcastlegovernmenta government
It was replaced by the Pitt–Newcastle ministry headed by the Duke of Newcastle and including Pitt, Henry Fox and the Duke of Bedford.

William Cavendish-Bentinck, 3rd Duke of Portland

Duke of PortlandThe Duke of PortlandPortland
On 8 November 1766, Portland married Lady Dorothy Cavendish, a daughter of William Cavendish, 4th Duke of Devonshire and Charlotte Boyle.

Baron Clifford

Baron Clifford (1628)barony of CliffordClifford
He married Lady Charlotte Elizabeth Boyle, 6th Baroness Clifford (1731–1754), the daughter and heiress of Richard Boyle, 3rd Earl of Burlington of the first creation, a famous architect and art collector.
This Clifford peerage then devolved upon Charlotte Cavendish, Marchioness of Hartington, wife of the future 4th Duke of Devonshire.

Lord Chamberlain

Lord Chamberlain of the HouseholdKing's Chamberlainchamberlain
Devonshire was Lord Chamberlain in Newcastle's government (with a seat in the inner Cabinet) and his relations with him were close.

George Cavendish, 1st Earl of Burlington

Lord George CavendishGeorge CavendishGeorge Augustus Henry Cavendish, 1st Earl of Burlington
Cavendish was the third son of William Cavendish, 4th Duke of Devonshire and the former Lady Charlotte Boyle, daughter of Richard Boyle, 3rd Earl of Burlington of the first creation, whose title had become extinct upon his death in 1753.

Lord Lieutenant of Derbyshire

Lord-Lieutenant of DerbyshireDerbyshireLieutenancy Office, Derbyshire
Devonshire resigned his Lord Lieutenancy of Derbyshire in solidarity with Newcastle and Rockingham when they were dismissed from their Lord Lieutenancies.

Richard Boyle, 3rd Earl of Burlington

Lord BurlingtonRichard BoyleRichard Boyle, 3rd Earl of Burlington and 4th Earl of Cork
He married Lady Charlotte Elizabeth Boyle, 6th Baroness Clifford (1731–1754), the daughter and heiress of Richard Boyle, 3rd Earl of Burlington of the first creation, a famous architect and art collector.
Lord Burlington's architectural drawings, inherited by his son-in-law, William Cavendish, 4th Duke of Devonshire, are preserved at Chatsworth House, and enable attributions that would not otherwise be possible.

William Cavendish, 7th Duke of Devonshire

Duke of Devonshire7th Duke of DevonshireWilliam Cavendish
1863). His father was the eldest son of Lord George Cavendish (later created, in 1831, The 1st Earl of Burlington, by the second creation), third son of The 4th Duke of Devonshire and Lady Charlotte Boyle, daughter of The 3rd Earl of Burlington and 4th Earl of Cork.

Dorothy Bentinck, Duchess of Portland

Lady Dorothy CavendishLady DorothyDuchess of Portland
Dorothy Cavendish was born on 27 August 1750 to William Cavendish, 4th Duke of Devonshire, the Prime Minister of Great Britain and his wife Lady Charlotte Boyle, 6th Baroness Clifford.

Chatsworth House

ChatsworthChatsworth EstateDevonshire Collection
The Duke employed Capability Brown to landscape the garden and park at Chatsworth House, his main residence.
Chiswick House—the celebrated Palladian villa in the suburbs of West London that the Devonshires inherited when the 4th Duke married Lord Burlington's daughter—was sold to Brentford Council in 1929.