Question: What role did Anne Innes-Ker, Duchess of Roxburghe (daughter of the 7th Duke of Marlborough) serve to Queen Victoria?

Passages:
George Victor Robert John Innes-Ker, 9th Duke of Roxburghe (7 September 1913 – 26 September 1974) was the son of Henry John Innes-Ker, 8th Duke of Roxburghe and Mary Goelet.  He succeeded his father in 1932. Arthur Collins CB, MVO, Commander, Hohenzollern Order (26 June 1845 – 21 November 1911), was Equerry and Comptroller for Princess Louise, Queen Victoria's 4th daughter and Gentleman Usher in the households of Queen Victoria and King Edward VII.  He attended Princess Louise in her role as the wife of John Campbell, 9th Duke of Argyll (at that time Marquis of Lorne), who was Governor General and Vice Regent of Canada between 1878 and 1883.  Collins represented Princess Louise at the funerals of Lord Beaconsfield, Benjamin Disraeli, and William Ewart Gladstone, the two competing Prime Ministers during Queen Victoria's reign.  Collins attended as a Gentleman Usher the coronation of King Edward VII and probably Victoria's funeral. Henry John Innes-Ker, 8th Duke of Roxburghe (24 July 1876 – 29 September 1932) was a Scottish peer and courtier. John Winston Spencer-Churchill, 7th Duke of Marlborough (2 June 1822 – 4 July 1883), styled Earl of Sunderland from 1822 to 1840 and Marquess of Blandford from 1840 to 1857, was a British Conservative cabinet minister, politician, and nobleman.  He was the paternal grandfather of Prime Minister Sir Winston Churchill. Anne Emily Innes-Ker, Duchess of Roxburghe {'1': ", '2': ", '3': ", '4': "} ("née" Spencer-Churchill; 14 November 1854 – 20 June 1923) was the daughter of the 7th Duke of Marlborough, who served in Conservative governments as Lord President of the Council and Lord Lieutenant of Ireland.  She served as Mistress of the Robes to Queen Victoria. Guy David Innes-Ker, 10th Duke of Roxburghe (born 18 November 1954), styled Marquess of Bowmont and Cessford until 1974, is a British aristocrat. James Henry Robert Innes-Ker, 7th Duke of Roxburghe (5 September 1839 – 23 October 1892), became Duke of Roxburghe on the death of his father, James Henry Robert Innes-Ker, 6th Duke of Roxburghe. Ogden Goelet (June 11, 1851 New York City – August 27, 1897 Cowes, Isle of Wight) was an American heir, businessman and yachtsman from New York City during the Gilded Age.  With his wife, he built Ochre Court in Newport, Rhode Island, his son built Glenmere mansion, and his daughter, Mary Goelet, married Henry Innes-Ker, 8th Duke of Roxburghe. The title Baron Mordaunt was created in 1529 for Sir John Mordaunt.  The fifth baron was created Earl of Peterborough in 1628 and the title then passed to his son, the second earl, in 1644.  On his death in 1697, the earldom was inherited by the his nephew, Charles and the barony was inherited by his only child, Mary, the estranged wife of the 7th Duke of Norfolk.  When she died childless in 1705, the barony was also inherited by Charles, who had also been created Earl of Monmouth.  On the death of the 5th Earl of Peterborough in 1814, the title passed to his elder half-sister, Mary.  When she died childless in 1819, the title then passed to the 4th Duke of Gordon, who was a maternal great-grandson of the 1st Earl of Peterborough.  The title was then inherited by the 5th Duke of Gordon in 1827 and when he died without legitimate issue in 1836, the title became abeyant between his sisters (Charlotte Lennox, Duchess of Richmond, Susan Montagu, Duchess of Manchester, Georgiana Russell, Duchess of Bedford, Louisa Cornwallis, Marchioness Cornwallis and Lady Madeline Palmer) and their issue. Margaret Elizabeth McConnel was the daughter of Frederick Bradshaw McConnel, the second wife of George Victor Robert John Innes-Ker, 9th Duke of Roxburghe, and the mother of Guy David Innes-Ker, 10th Duke of Roxburghe, and Lord Robert Anthony Innes-Ker.  She was previously married to Lt.-Col.  James Church.

Supporting sentences:
 She served as Mistress of the Robes to Queen Victoria. John Winston Spencer-Churchill, 7th Duke of Marlborough (2 June 1822 – 4 July 1883), styled Earl of Sunderland from 1822 to 1840 and Marquess of Blandford from 1840 to 1857, was a British Conservative cabinet minister, politician, and nobleman.