The Roland S. Morris Papers consist of correspondence, diaries, writings, and other materials that document Morris's family life, political involvement in the Democratic Party, and his position as the U.S. Ambassador to Japan from 1917-1921. The collection includes correspondence between Morris and his family, particularly his wife, Augusta Shippen West, as well as official incoming correspondence during Morris's ambassadorship and correspondence from Woodrow Wilson and Edith Bolling Wilson to Morris. Diaries and journals include travel accounts from Morris and his wife, along with a description of Morris's mission to Siberia in 1919 written by Frank C. MacDonald, an assistant at the Japanese embassy. The Writings section of the Morris Papers includes published and unpublished works relating to Japan and diplomacy. Biographical material includes information on the Morris family, particularly Morris's marriage to Augusta Shippen West in 1903.