Pick one category for the following text. The options are - company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work. Willie Ross Baron Ross of Marnock - William 'Willie' Ross Baron Ross of Marnock MBE (7 April 1911 10 June 1988) was the longest serving Secretary of State for Scotland holding office from 1964 to 1970 and again from 1974 to 1976 throughout the prime ministership of Harold Wilson.
Office Holder