Charles William Slingsby "Sim" Duncombe, 3rd Earl of Feversham DSO (2 November 1906 – 4 September 1963), styled the Hon. Charles Duncombe until 1915 and then Viscount Helmsley until he succeeded his father in 1916, was a British Conservative politician.
Feversham was the eldest son of Charles Duncombe, 2nd Earl of Feversham, and his wife Lady Marjorie Blanche Eva, daughter of Francis Greville, 5th Earl of Warwick, and was educated at Eton. He succeeded in the earldom in 1916, aged only nine, when his father was killed in the First World War.  
Feversham took his seat on the Conservative benches in the House of Lords and served under Ramsay MacDonald and Stanley Baldwin as a Lord-in-waiting (government whip in the House of Lords) from 1934 to 1936 and under Baldwin and later Neville Chamberlain as Parliamentary Secretary to the Ministry of Agriculture and Fisheries and Deputy Minister of Fisheries from 1936 to 1939.
Feversham was also a Lieutenant-Colonel in the 13th/18th Royal Hussars and an Honorary Colonel in the Queen's Own Yorkshire Yeomanry and fought in the Second World War, where he was awarded the Distinguished Service Order in 1945.
Feversham was Treasurer of the University of Leeds from 1959 to his death.
During the passing of the Children and Young Persons Act 1963 reference was made to Feversham's experience as a probation officer, and later position as the President of the Association of Probation Officers. 
Lord Feversham married Lady Anne Dorothy Wood, daughter of E. F. L. Wood, 1st Earl of Halifax, in 1936. The marriage was not a love match; diarist Chips Channon described the ceremony as "hideous" and "cynical". Over the course of their unhappy marriage, both took lovers.  They had one daughter:
Although it was thought an heir to the title might be born, Anne Feversham "was disinclined to endure another pregnancy, not least if it meant forfeiting a hunting season". 
Feversham died in September 1963, aged 56. On his death the earldom and viscountcy of Helmsley became extinct while he was succeeded in his junior title of Baron Feversham by his fourth cousin Peter Duncombe. The Countess of Feversham was made an MBE in 1950 and a CBE in 1979. She died in 1995.
Earl of Cork is a title in the Peerage of Ireland, held in conjunction with the Earldom of Orrery since 1753. It was created in 1620 for Richard Boyle, 1st Baron Boyle. He had already been created Lord Boyle, Baron of Youghal, in the County of Cork, in 1616, and was made Viscount of Dungarvan, in the County of Waterford, at the same time he was given the earldom. These titles are also in the Peerage of Ireland.
Viscount Mountgarret is a title in the Peerage of Ireland.
Baron Feversham is a title that has been created twice, once in the Peerage of Great Britain and once in the Peerage of the United Kingdom. The first creation, in the Peerage of Great Britain, came in 1747 when Anthony Duncombe, who had earlier represented Salisbury and Downton in the House of Commons, was made Lord Feversham, Baron of Downton, in the County of Wilts. He had previously inherited half of the enormous fortune of his uncle Sir Charles Duncombe. However, Lord Feversham had no sons and the barony became extinct on his death in 1763. The peerage was revived in the Peerage of the United Kingdom in 1826 in favour of his kinsman Charles Duncombe, who was created Baron Feversham, of Duncombe Park in the County of York. He was a former Member of Parliament for Shaftesbury, Aldborough, Heytesbury and Newport. Duncombe was the grandson of Thomas Duncombe, son of John Brown by his wife Ursula Duncombe, aunt of the first Baron of the 1747 creation. Ursula had inherited the other half of her brother Sir Charles Duncombe's fortune. Lord Feversham son, the second Baron, sat as a Conservative Member of Parliament for Yorkshire and the North Riding of Yorkshire.
Earl of Feversham is a title that has been created three times, once in the Peerage of England, once in the Peerage of Great Britain and once in the Peerage of the United Kingdom. All three creations are now extinct.
Elizabeth Manners, 15th Baroness Ros of Helmsley was the daughter and heir of Edward Manners, 3rd Earl of Rutland. On her father's death the Earldom of Rutland devolved upon his brother, the Barony of Ros passed to his daughter, Elizabeth.
John Armine Wodehouse, 5th Earl of Kimberley FRSA, is the eldest of four sons of John Wodehouse, 4th Earl of Kimberley, but only child with Carmel Maguire, daughter of Mickey Maguire, welterweight champion of Australia. He succeeded to the earldom and barony in 2002.
Duncombe Park is the seat of the Duncombe family who previously held the Earldom of Feversham. The title became extinct on the death of the 3rd Earl in 1963, since when the family have continued to hold the title Baron Feversham. The park is situated one mile south-west of Helmsley, North Yorkshire, England and stands in 300 acres (120 ha) of parkland. The estate has a commanding location above deeply incised meanders of the River Rye within the North York Moors National Park.
Charles Duncombe, 1st Baron Feversham, was a British Member of Parliament.
William Ernest Duncombe, 1st Earl of Feversham, known as The Lord Feversham between 1867 and 1868, was a British Conservative politician.
James Annesley, 3rd Earl of Anglesey, succeeded to his Earldom on the death of his father, James Annesley, 2nd Earl of Anglesey in 1690, the same year in which he matriculated at Christ Church, Oxford. His mother was Lady Elizabeth Manners, daughter of John Manners, 8th Earl of Rutland. In October 1699 he married Lady Catherine Darnley, illegitimate daughter of James II of England by Catherine Sedley, Countess of Dorchester. They had a daughter, Lady Catherine Annesley, who married William Phipps and was an ancestress of the Baron Mulgrave.
Henry George Bathurst, 4th Earl Bathurst, styled as Lord Apsley from 1794 to 1834, was a British peer and Tory politician.
Lieutenant-Colonel Charles William Reginald Duncombe, 2nd Earl of Feversham, known as Viscount Helmsley from 1881 to 1915, was a British Conservative Party politician and soldier.
William Reginald Duncombe, Viscount Helmsley, was a British Conservative Party politician.
The Hon. Montagu Curzon was a British soldier and Conservative politician.
Dudley Henry Eden Stanhope, 9th Earl of Harrington, was a British peer.
Charles Anthony Peter Duncombe, 6th Baron Feversham was a British nobleman and writer.
Louisa Scott, Countess of Eldon, formerly the Hon. Louisa Duncombe, was the wife of John Scott, 2nd Earl of Eldon.
Frances Marsham, Lady Romney, formerly Lady Frances Wyndham, was the wife of British politician Charles Marsham, 1st Earl of Romney. Although occasionally referred to as "Countess of Romney", she died before her husband was raised to the earldom in 1801.
Mary Frances Parker, Countess of Macclesfield, formerly Mary Drake, was the wife of George Parker, 4th Earl of Macclesfield.
Sir Charles Frederick Richmond Brown, 4th Baronet TD DL was a British soldier.