Marquess of Linlithgow the Baron Rankeillour for more information on this branch of the family). The Hon. James Hope-Wallace, second son of the fourth Earl, was a lieutenant-colonel in the army and sat as a Member of Parliament. Charles Dunbar Hope-Dunbar, grandson of the Hon. Charles Hope, third son of the fourth Earl, proved his claim to the Dunbar Baronetcy of Baldoon (created in 1664) in 1916 and became the 6th Baronet (see Hope-Dunbar baronets). Lord John Hope, younger twin son of the second Marquess, was a prominent Conservative politician and was created Baron Glendevon in 1964. Marquess of Linlithgow Marquess of Linlithgow,
Marquess of Salisbury Marquess. The fourth Marquess was also an influential Conservative politician and served as Lord Privy Seal, as President of the Board of Trade, as Lord President of the Council, as Chancellor of the Duchy of Lancaster and as Leader of the House of Lords. Like his father he was regarded as a staunch Conservative and bitterly opposed the Parliament Act 1911, which sought to curtail the powers of the House of Lords. His eldest son, the fifth Marquess, was also a Conservative politician. In 1941 he was summoned to the House of Lords through a writ of acceleration in his