Mercer, William Newton. Papers, 1789-1936 (bulk 1827-1874). 2 linear ft., 2 microfilm reels. Location: U:1, UU:79-81, VAULT:1, OS:M, MSS.MF:M. Surgeon and planter of Adams County, Mississippi; Louisiana; and Illinois. Collection includes slave records, diaries, business and personal correspondence, and financial documents. Correspondence includes letters from Henry Clay, Abraham Lincoln, and Benjamin Butler. Available (with some omissions) on microfilm 6061 and 5322: University Publications of America Records of Southern Plantations from Emancipation to the Great Migration, Series B, Part 4, Reels 9-10, and Records of Ante-Bellum Southern Plantations from the Revolution through the Civil War, Series I, Part 3, Reels 1-3. For further information, see online catalog. Mss. 292, 1051, 1233, 1364.