駐日アメリカ合衆国大使
The son of W. Henry Harrison and Helen (Skidmore) Harrison, he was educated at Eton College, Harvard College, and Harvard Law School. After law school, Harrison became the private secretary of United States Ambassador to Japan Thomas J. O'Brien. He was appointed Third Secretary of the U.S. Embassy in Tokyo on June 10, 1908. He later filled posts in the United States embassies in Peking, London, and Bogotá. In 1918, he became diplomatic secretary of the American Commission to Negotiate Peace. He later became counselor of the U.S. Embassy in Paris.