He was a Conservative politician and held office in the administrations of Lord Salisbury and Arthur Balfour as Lord-Lieutenant of Ireland, as Postmaster General, as President of the Board of Education, as Lord Privy Seal and as Lord President of the Council.
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He was the son of Alexander Stewart, who had married Mary Cowan, sister and heiress of Robert Cowan, who gained great wealth as Governor of Bombay from 1729 to 1737.
Charles Cornwallis, 1st Marquess Cornwallis | County Londonderry | Robert Gascoyne-Cecil, 3rd Marquess of Salisbury | Marquess | Francis Rawdon-Hastings, 1st Marquess of Hastings | Richard Wellesley, 1st Marquess Wellesley | Marquess of Bute | Wills Hill, 1st Marquess of Downshire | James Broun-Ramsay, 1st Marquess of Dalhousie | David Cecil, 6th Marquess of Exeter | Robert Grosvenor, 1st Marquess of Westminster | Londonderry | Henry Paget, 1st Marquess of Anglesey | Frederick Hervey, 8th Marquess of Bristol | Frederick Hamilton-Temple-Blackwood, 1st Marquess of Dufferin and Ava | Victor Hervey, 6th Marquess of Bristol | Robert Wynn Carrington, 1st Marquess of Lincolnshire | Marquess of Rockingham | Marquess of Lansdowne | marquess | John Neville, 1st Marquess of Montagu | Freeman Freeman-Thomas, 1st Marquess of Willingdon | Paul Marquess | Marquess of Milford Haven | Marquess of Anglesey | Marquess of Ailsa | John Hamilton-Gordon, 1st Marquess of Aberdeen and Temair | William Parr, 1st Marquess of Northampton | Victor Hope, 2nd Marquess of Linlithgow | Marquess of Sligo |
A head-on collision occurred at Abermule on 26 January 1921, killing 15 passengers, including Lord Herbert Vane-Tempest, a director of the company and son of the fifth Marquess of Londonderry.
She finishes her education at Frau Beck's Finishing School, in Dresden, Germany in 1905, and has her coming out ball in May that year at Londonderry House.
The Lordship of the Manor of Kelloe was bought by the Tempests of Broughton Hall, North Yorkshire, and bequeathed by Sir Henry Vane-Tempest to his daughter, Lady Frances Vane, who married the third Marquess of Londonderry.
It was brought into the family by the marriage of George Henry Robert Charles William Vane-Tempest, Viscount Seaham (and subsequently Earl Vane and 5th Marquess of Londonderry), to Mary Cornelia Edwards, whose father Sir John Edwards had extended and renamed the house.