William Henry Harrison (February 9, 1773 – April 4, 1841) was an American military officer and politician who served as the ninth president of the United States in 1841. Tyler claimed a constitutional mandate to become the new president and took the presidential oath of office, setting an important precedent for an orderly transfer of the presidency and its full powers when the previous president fails to complete the elected term. Harrison was born in Charles City County, Virginia, the son of Founding Father Benjamin Harrison V and the paternal grandfather of Benjamin Harrison, the 23rd president of the United States. Harrison wrote in a letter dated March 10, 'I am so much harassed by the multitude that calls upon me that I can give no proper attention to any business of my own.'