Browning family members including Robert Lewright Browning (1803-1850), naval officer, his wife Eleanor Hanlon Browning, and their sons, Robert Lewright Browning (1835-1860), marine officer, and Charles Henry Browning (1846-1926), genealogist. Correspondence, journals, biographical file, genealogical and other notes, newspaper clippings, and printed material of the Browning family.

United States president, secretary of state, and representative and senator from Pennsylvania. Correspondence, his 1858 State of the Union message, and miscellaneous items pertaining primarily to Buchanan’s career before his election as president. Also correspondence of Harriet Lane Johnston, Buchanan’s niece and White House hostess.

Polish scholar and author and advocate of Panslavism. Correspondence, notes and writings, printed matter, photographs and other papers relating mainly to de Gurowski’s scholarship. Includes biography of Gurowski by Julius Bing and a draft of Bing’s autobiography.

United States Army officer, engineer, and ordnance expert. Correspondence, travel and other diaries and journals, and miscellaneous papers of Mordecai and his family.