During which years did the father of Maurice Macmillan serve as Prime Minister of the United Kingdom?
Harold Macmillan Maurice Harold Macmillan, 1st Earl of Stockton, {'1': ", '2': ", '3': ", '4': "} (10 February 1894 – 29 December 1986) was a British statesman of the Conservative Party who served as Prime Minister of the United Kingdom from 1957 to 1963. Nicknamed "Supermac", he was known for his pragmatism, wit and unflappability.
Richard Grosvenor, 1st Baron Stalbridge Richard de Aquila Grosvenor, 1st Baron Stalbridge {'1': ", '2': ", '3': ", '4': "} ≤ (28 January 1837 – 18 May 1912), styled Lord Richard Grosvenor between 1845 and 1886, was a British politician and businessman. Initially a Liberal, he served under William Ewart Gladstone as Vice-Chamberlain of the Household between 1872 and 1874 and as Parliamentary Secretary to the Treasury between 1880 and 1885. However, he broke with Gladstone over Irish Home Rule in 1886 and joined the Liberal Unionists.