Guide to Research CollectionsAlabama Department of Archives and History
Papers: In William Lowndes Yancey papers, 1834-1941; and Semmes family papers, 1859-1913.
Boston Public Library
Papers: 15 items.
Special Collections Library
Papers: 1835-1865. .10 foot. Personal and business papers, including comments on the Civil War, its campaigns, and Lincolns assassination from Masons perspective as the Confederacys representative in England. Finding aid.
Gunston Hall Library
Papers: In Mason family papers, 1664-1897.
Historical Society of Pennsylvania
Papers: In Chew family papers, 1683-1896.
Library of Congress
Papers: 1838-1870. 9 containers. In part transcripts. Chiefly diplomatic communications sent while Confederate commissioner. Described in the Annual Report (1912-1913) and published guide (1918). Also correspondence in William Wilson Corcoran papers, 1791-1896.
New-York Historical Society
New York, NY
Papers: December 24, 1845 and August 15, 1856. 2 letters.
Pierpont Morgan Library
New York, NY
Papers: 5 items (1839-1961); and 2 letters (April 26, 1858 and December 19, 1861) in the Gilder Lehrman collection. Finding aid.
State Historical Society of Wisconsin
Papers: In Charles Wilkes papers, 1801-1880.
University of Rochester
Rush Rhees Library
Papers: 4 letters by and 1 to Mason (1850-1864) in various collections. Finding aid.
University of Virginia
Papers: 22 items (1836-1871) in Mason family papers and other collections including personal correspondence, business papers, and portraits. Finding aids to some collections.
Virginia Historical Society
Papers: January 1853. 5 items. Masons correspondence concerning James D. Grahams biological collections.
Additional Papers: 1 letter from Levin Powell (November 20, 1848); 1 letter (March 17, 1853) from Haym M. Salomon; 1 letter (February 19, 1853) from Ephraim George Squier; 1 letter (April 3, 1853) from Richard Rush; 1 letter (April 28, 1864) from William Smith; items in Custis-Lee-Mason letters, 1756-1863; and photographs.
Virginia State Library and Archives
Papers: 1837-1864. 11 letters. Finding aid.
Yale University Libraries
Manuscripts and Archives
New Haven, CT
Papers: In S. Griswold Flagg collection, 1825-1938.